[classified]

A comment from the article page:

I blame Haskell and the sudden fixation on absolute purity that manifested just as the VC-startup set decided it was the next secret sauce, to the point of literally redefining what "functional programming" meant in the first place.

I think that fixation has forced a lot of focus on solving for "how do we make Haskell do real work" instead of "how do we make programming in general more predictable and functional", and so the latter fight got lost to "well we bolted lambdas into Java somehow, so it's functional now".

Bullseye.