Cynical me says no. There was an "XML all the things" craze back in the early 2000s. My wife is a tech writer, and from what I can tell, the vast amount of tooling created at that time is still king today, albeit in a nominally updated form. At least that seems to be the big enterprisey market.

Startups and other hip young companies do whatever's sexy in the moment. This is the sort of tool I'd use as a consultant doing technical things, however, because I can do powerful things quickly. I mostly use org-mode, but this holds appeal too.