Hah, that reminds me! My first work issued Mac didn't have the ESC key, just the touch bar. IIRC a program hung in fullscreen, freezing both the app and the touch bar. So I had to reboot to get out of it because the esc key didn't work.
It also could get mad hot on my 2016 MBpro when video editing. Still love(d) that computer though…
I also would not mind it in addition to regular keys, there are some great interactions in there. But it's an extremely poor keyboard-emulator. Splitting off the escape key made a huge improvement, but it's nowhere near enough.
What a nightmare. ‘Mad hot’ even on… just being alive.