They just didn't do anything with the touchbar. It could have actually been more useful. The removal of the esc key was pretty dumb though.

The only useful thing I remember about the touch bar was the DJ trying to play some beats on the touch bar. That was just weird imo.

Barring removal of Esc key, I think the touch bar was useful because it showed contextual actions. But not every app used it so it didn't really get a chance to shine.