This takes the touchbar from 'annoying' to 'ok this is kind of useful actually', for me at least. I spend a lot of time on a keyboard + trackball combo, but keep my laptop propped a bit for TouchID, zooming, and one or two other useful idioms.
I've been hiding the Dock for a solid decade, and it's a more useful default than, say, the illegible window snapshots Safari insists on offering over the obvious choice of favicon + a few letters of the title.
It's baffling to me that none of Chrome, Firefox, nor Safari, offer that interface for the touchbar on Mac.
I do find the Touch Bar useful for music controls and scrubbing through a video, but that's about it.
I do not use the Fn keys in MacOS - and having media controls, screen lock, and other data in the touchbar makes more sense for me. It was and is an experiment in user behavior and UI. Some like it, some don't. I'm not committed to it, but I don't want the HN bubble to think their "bad touchbar" is the only opinion.
Some want headphone jack, many don't. Some like the butterfly keys, many don't. Touchbar, USB-A, Magsafe, Touch ID, small OLED form factor... they pick a side and go.
Not quite one button, but option- clicking the notifications icon at the far right of the menu bar will also enable do not disturb
I was forced to remove several buttons from the touch bar, because when I go to type numbers I will occasionally brush the bar with my fingertips, interrupting my workflow as something random suddenly pops up.
I hate the Touch Bar.
I did add the "Do Not Disturb" key to the touchbar; it's nice to have one-button access to that function when I need to get work done without distractions.