Problem Solved
While in London a couple of months ago I visited an Apple Store. I tried typing on the 2017 MacBook Pro in the store and got all manner of random cursor jumping. I left a whole page of this on the computer.
Then I got talking with an employee. Nice guy. He said that the Track Pad oversensitivity, random cursor jumping could be fixed and urged me to bring in my computer. I was heading up to Scotland in a day or two, but that was good to know.....
Okay back in the States I finally got around to taking my 2017 15" MacBook Pro into the Apple Store. The Genius Bar guy said he hadn't heard of the track pad issue, but there was a free replacement of the keyboard because of the Known Issues they were having, and replacing the keyboard required replacing the whole top...(you guys know all this.)
It took two weeks. Not a problem because my 2011 still works. When I went to pick up my MBP, I paused to try the keyboard on the 2018 MBP. I didn't like it at all. It felt like I was typing on keys that didn't move. However, it didn't cursor jump, so.... I filed it as 'information,' and went to wait for my MBP to come out.
As soon as I tried typing on it, I said, "This is the 2018 keyboard." The Genius Bar woman said it was. Well, I could grumble, but... it didn't cursor jump, and that was the critical issue.
At home I started in on a long type session to see if the problem really had been solved. I was just rambling in my journal saying that I was getting used to the new keyboard and then I got a random cursor jump. Uh-oh... My palms were sweaty, the weather's hot. Maybe that was it, maybe not. It's been good since then. No more Jumps. If it does jump even every hour I can live with it. I make typing errors more frequently than this.
Here's what I also noticed. First I didn't go from the 2017 keyboard to the 2018 keyboard. I was typing on a 2011 MBP for two weeks. I really like that keyboard. I also liked the snappy click of the IBM Selectric and got the third party keyboard most like it for my first Mac (IIci) in 1992.
But just before that Random Cursor Jump an hour into typing, I had become used to the new keyboard and it seems just fine. It does raise the issue of whether or not the 2017 keyboard had more problems than when it stopped typing J. Maybe it was missing a lot of letters just not all the same letter. If so I just figured I was making more typing errors.
My writing did fall off significantly when I got the 2017 MBP in June 2017.
The more interesting observation I had was that subjective impressions about keyboards are far more significant than any objective result, and this should be taken into account. It works like this. Suppose you paid a user $1 a word for as many words they can type in ten minutes. Maybe I'm the user. On my 2011 I happily type away and come up with 280 words. Terrific. Then I switch to this 2018 keyboard and plug away for another ten minutes. Before I'm told that I've just typed 320 words, I'm already grumbling about preferring my old keyboard. Am I wrong?
Well, even if I'm completely neurotic about it; and I stop writing-- then it is a problem. I should just write on the old computer and not worry.
If however, I keep an open mind, give the new keyboard a chance; than I'll arrive at being more productive and then just think of the old keyboard as just different. (I've been through this many many times: In the mid-1990s I pulled out my mid-1970s Smith Corona electric typewriter.
It was like pumping water with my fingers. It made me remember switching from my mom's manual Underwood to the Smith Corona. My mom could type on that Underwood probably 60 wpm, maybe more. She used to break the Remington typewriter at her job at Ford about once a week, typing faster than 100 wpm (I can't even match this with copy-paste) She begged them to just get her an IBM.)
Tip: When you get that new computer and you hate the keyboard. You probably just have to get used to it. What I think would help this process is to just work on your typing. What mistakes are you making? How can you slowly but more precisely move your fingers so that you hit the correct keys? Set up some drills. Long standing Deliberate Practice technique says to first concentrate on making the movements without error. Only after you've completely mastered this, do you speed up. (Anders Ericsson Ten Thousand Hours and Deliberate Practice. Academic papers, but proven science, easy to read; and the foundation of building world class level skills)
I have an iHome USB numerical key pad. It just seems so obvious to me that we trackpad or mouse with our right hand, so why not enter numbers with our left? However, with the numerical keypad I found that I could never successfully touch type on it.
Issues, all the keys feel the same, he little dot for the home key is too small, so you think 6 and type '+' or '5'. So I tried dots of hot glue: the corner keys 7913 a dot in the middle 5, and a horizontal line for 0. Now I can touch type on the silly thing. It's just so obvious.
Looking for dots and textures commercially made that might be better....Nothing seems as easy, cheap or useful as the hot glue dots. They don't mess up the keyboard, are easy to remove and you can fiddle with different shapes and remove them as you progress. I'd already done some of this with bits of tape on a bluetooth keyboard and it helps.
So on my MacBook Pro I'm going to hot glue 'dot, dash, line' some keys to improve my typing. But I'm already use to this new keyboard.
One last thing: Durability of keyboards. On my 2011 MacBook Pro, which I used from about October 2011 to June 2017, that's almost 6 years. At well over a million words a year (my daily journals are at least 700,000 each year) that's heavy usage, yet the keyboard still works like new. That's durable. With the new keyboards I think the 2016 and 17 keyboards just had serious issues, first impression with the 2018 keyboard is that it seems to have fixed those issues.
(and to the MacRumors member who busted my chops that I should've returned the 2017 and gotten a 2015? Still good advice. Thanks.)
About 3-5 months ago, I had the non-responsive problem with the 'J' key. I searched for information and found the usual noise on the Apple user Forum. Apple was mum. Typical, typical. Before slogging through the 'Genius' appointment stuff, trying to find parking near the Apple Store.... I fiddled around and 'flossed' the edge with a toothpick. That fixed it.
Sure it should never have happened, but it does happen--it's just that Apple seems to think pretending it didn't happen is a solution. It's bad practice.
I spent $4k on the top of the line computer from the top of the line company, and when I had a (by then) well known issue...Apple's solution is I could chat with a bunch of people with the same problem none of whom had a solution?
"Hey my plumbing is leaking! Great, we're going to let you talk with dozens of other people who also don't know how to fix leaking plumbing."
After I fixed my 'J' key, I didn't jump on the blog to share my 'fix'. It worked for me but should I recommend people to pole around their keyboards with a sharp stick?
The people still there were fumbling around -- with no help from Apple. (But apparently eager lawyers)
These are tools not pretty little fetishes, if they don't work, they aren't so pretty. (I've had a chronic problem with the trackpad since June 2016-- the only solution is one I came up with. Apple after two weeks swapped the machine, but it too had the same exact problem.)
Apple needs to lead, send us updates on these problems as they spread. I don't know if the air blaster solution works, but that's what I'd do if it happened again.
I don't want another $2 check postcard for a class action. I want Apple to step up and be the company I believed in, purchased from and invested in.