I agree. As I said in other places… the time of early adopters are over: people got jobs, researches moved to other topics, etc… Business is now a bit less exciting as 7 or so years ago, but that doesn’t mean haskell is dying.
It’s getting more mature on some fronts. People don’t try as hard to get niche use cases working anymore (haven’t heard from enthusiastic game devs in Haskell for a while). Maybe there’s less energy now to put insane amount of hours into starting new never-seen projects… at least for unpaid volunteers. The open-source front indeed sometimes feels like it’s cooling down. But that’s probably also because many things have been solved and we’ve figured out what works well and what doesn’t.
Haskell is not a “startup” anymore.