Parent commenter was clearly referring to the investment market, since the entire subject is a fall in stock price. Crossing the chasm has nothing to do with the investment market.
> activist letter telling Meta to give up on the Metaverse
I assumed it were some users who came up with that letter, but a quick google search indeed revealed it was investors. That wasn't clear to me and you are indeed correct.
I guess the parent commenter used the wrong word to describe the people who tell meta not to innovate.
Crossing the chasm is a real thing for startups, and in that sence the mainstream indeed doesn't like the early part of innovation.
So when you say "mainstream" instead of "market", than it does makes sense.
https://en.m.wikipedia.org/wiki/Crossing_the_Chasm