Well I just got a 128gb LTE 2018 iPad and Zagg Rugged Book keyboard case.
After my first full week, here are my initial observations. I like the Zagg case, it certainly makes for a much more rugged solution than my MacBook Air. I can just carry it around loose in the car without putting it into a padded bag. Also like the way I can reverse the screen for watching videos, or quickly pop the iPad off the keyboard. It seems very heavy, but I think that's needed to counterbalance the weight of the iPad when it's tilted back. Keys have a decent amount of travel but are kind of "bouncy", and the overall feel is a bit weird with fast touch typing because it's basically a hollow plastic box.
Had thought about getting the Brydge 9.7 keyboard which is supposed to be more like a real Apple keyboard, but there seem to be a lot of complaints on Amazon about failures and poor customer service. I don't really need another keyboard for now, so I'll just stick with the Zagg.
I signed up for the personal version of Office 360 (I really needed to update Office 2008 on my Mac anyway) and it seems to work very nicely on the iPad. I will definitely find a lot of uses for it. I got an app called FileExplorer Pro for $5. It's kind of awkward but it lets me wirelessly access files on my Mini and Time Capsule and is integrated into the iOS Files app.
Which brings me to the things I don't especially like. The Files app is certainly something that was needed but it's so limited and just feels like version 1.0 software. It's a lot more awkward than copying/moving files on a Mac. It also seems very slow, and there's no progress bar so when copying a big file (like a movie) you just have to wait and hope something is actually happening.
In general, my biggest complaint is that working with text (selecting/copying, positioning the cursor) is just painful. I sort of expected this after having an iPhone for almost 10 years, but hoped it would work better on a larger screen. Some software is better than others - I found it more manageable in MS Word for example. This website is actually one of the WORST places to use a hardware iOS keyboard. Pressing the arrow keys moves the cursor but it also scrolls the whole page up or down, and the text you're editing goes off screen. Does an Apple Pencil help with text editing? I have a fairly nice fine point stylus (a Jot Dash) and it works, but isn't that much of an improvement over my finger.
If Apple would just add mouse support it could easily solve this problem. Would also be nice for some other things, like websites with lots of small links that are hard to select. I was looking at some things on filemaker.com (an Apple subsidiary) yesterday and somehow tapped a tiny link that asked me to choose my country. In trying to "swipe" back to the previous page, I hit another tiny link for some Asian country. Now the whole site became unintelligible. This was really annoying - on the Mac I could have just deleted the filemaker cookies, but on the iPad the only option is deleting all cookes, which I didn't want to do. After a lot of trial and error I found my way back to the language selection screen, and used my Jot Dash stylus to select the tiny American English link.
Clearly, the iPad will not replace my Macs (I never expected it to). But I will find some good uses for it and will probably get used to most of the quirks.