Because I make lots of use of control, I usually map Right Command to Right Control, so I can easily thumb control, command or option at practically any time.
The touch bar isn't very useful, and it's bad for things that you want to really be "keys" that you want to be able to touch type. But it's nice for some things. Volume and brightness slider. Emojis sometimes.
Here's one use I found that I like: I sometimes work in the sunlight and want to switch to Light theme. I'm not aware of a nice convenient way to just toggle Light/Dark, so I found someone's instructions on how to bind a script that does that to a slot in the Touch Bar. Could that have been a keyboard shortcut? Sure, but I appreciate this option - kind of cool.
I have a dedicated lock button on the touch bar, which I use multiple times a day in the office. It's also great for searching through video and trimming in Final Cut.
Because I make lots of use of control, I usually map Right Command to Right Control, so I can easily thumb control, command or option at practically any time.