I've been following Macrumors for a long time (probably 10 years), but never felt the need to register. But this 'feature' compelled me to join.
I recently purchased a MBA 2018 (refurbished by Apple - because it's what I could afford, okay?), and thought this 'feature' was a bug and called Apple Support, who gave me all the same excuses/lines that I have seen repeated in this thread - which I didn't research until Apple told me this was a 'feature'. At the start of the call, I told the CSR that I was using terminal commands to adjust all my PMSETs, and she immediately forwarded me to a supervisor (because she didn't know much about terminal commands, which I found odd, but fine, I'll talk to a super). Super comes on to tell me this is a feature and there's no way to turn it off. I express my frustration and annoyance. I mean, they stripped out "Sudden Motion Sensor" and put in THIS??? WHT??? (Seriously, SMS was more important to me as someone who takes my Mac to and from work. The point of a laptop is to be PORTABLE, after all, and "wake on any key" seems to be the opposite of a portable feature.)
Anyway, she said, she hated the feature so much she gave her MBA to her kid. While that didn't appease me, it lets me know that SOME people at Apple are aware of the issue.
My BIGGEST issue with "wake on any key", is that I have often turned off my Mac (IE: Using the "shut down" option from the dropdown, let it completely shutdown before closing the lid, etc), put it in my bag and when I pull it out again at my destination, the battery has dropped by sometime 10% (depending on how long my drive is). This tells me that the Mac came awake again at some point. And the only thing I can think of is: it comes awake because the lid presses on the keys when I put in my bag (because I have "lid wake" and "AC wake" turned off, so it can't be anything else, right?).
Apple won't fix this issue and I fear 1: moving my laptop around when it's not completely shut down (and have it remain completely shut down) and 2: the additional wear and tear on the battery.
I mean, if they're not going to fix it, the least they could do is put SMS back in so there's SOME peace of mind when transporting my portable computer.
For now, I think my MBA is going to have to remain at home and I'll have to use my 2012 MBP (still on Mojave because of three 32-bit programs that are vital and won't be upgraded to 64-bit because politics) with its barely functional trackpad, because at least when it turns off, I know it's off.
ETA: Also, yes I put VM on my new machine to continue to use Mojave, but I don't like moving the machine if it's not off. Also the Super made an off-hand comment about Apple not wanting people to be able to customize the machines anymore, so I fear things will only get worse.