[L2R]

The issue is it takes away a significant amount of utility without adding any. Volume/brightness is slightly better, but you can get the same effect by holding down the physical button. Some users like to use Caps Lock for Ctrl, and this is an instance of the touchbar forcing a loss of utility with no gain.

Function keys are used heavily in IDEs, and forcing a large reach of fn + f# key isn't adding any utility either.

I have yet to see a situation where the touchbar adds some utility that merits the loss in other areas for users.