Touch Bar would have been more useful had they have an external keyboard with it. Almost no developers supported it because it was only available on a subset of devices. And then only in the case when people actually use the internal keyboard. I guess this excludes a lot of people who hook their computers to an external keyboard, screen and so on all the time.
It’s quite like 3D Touch in this sense. (But I actually liked 3D Touch, unlike the Touch Bar)
Yes! Apple sells ~18-21 million Macs a year. Out of those no MacBook Air, no iMac, no Mac mini, no iMac Pro, no Mac Pro, and some models of 13" MacBook Pro have the Touch Bar. Apple never went all-in on it. Though I'm happy if they're indeed going back to physical function keys.
It’s quite like 3D Touch in this sense. (But I actually liked 3D Touch, unlike the Touch Bar)