The core mistake Apple made with the Touch Bar was to focus on application-specific actions rather than cross-application ones, something BetterTouchTool actually remedies quite well.

It never made sense to duplicate actions that professional users already know the keyboard shortcuts for. You already have muscle memory for all of those, and even if you're learning a new app, it's faster long-term to learn the shortcut than to look down and hit a non-tactile spot on the Touch Bar every time.

For controlling other applications than the currently active one, however, the Touch Bar is great. I have BetterTouchTool set up to show my currently playing music, my next calendar appointment, and the weather, plus BTT's built-in clipboard management tool. I actually miss it when I'm working on my non-Touch Bar personal laptop.