Maybe, though maybe we're only noticing it when it's obvious? Sort of a survivorship bias thing?

Who knows how much of the comments on any website are written by humans now; yeah there are plenty of tells so it can be obvious, but that might only be for the exceptionally bad posts.

Maybe. This type of obvious slop is extremely pervasive though, to the point there almost can't be that much undetectable AI writing.

Checked LinkedIn and found four posts in a row that had "here's the kicker".