I'm sad to say it's still very commonly used by CAD jockeys, as graphical conventions dictate that much of the textual detail in construction documents should be in all-caps. Of course you'd think a "sophisticated" BIM system like Revit could handle this for you automatically, and yet...

In that case wouldn't you just turn capslock on and do your work? Or do you need to turn it on and off constantly?

If not, moving capslock to the touch bar is not a real problem.