Your finger never slipped and hit the "play" button by mistake, blasting the last song you played at max volume directly into your ear. Happened dozens of times in the first year of having a touchbar (work laptop, not my decision), super jarring every time. Decades of having a physical "play" function button hooked up to do the same thing and it didn't happen once.
Same. I had to remove all of the volume and media buttons and Siri from my Touch Bar prior to upgrading to M1. Interesting idea, poor execution, and no followup.