A combination IMO of lingering issues around the AT&T lawsuit and various community issues within the BSDs.

Yep, the copyrighted Socket code legal issue has stalled the BSD world for a considerable time. It's reasonable to conclude many users thought it was a deadend for BSD distros, and when Linux emerged as the most promising thing from all (free as in freedom, open to any contribution, not plagued by a closed governance like GNU hurd) they all emigrated en masses to the effort.

	▲	ghaff 3 days ago \| parent [-]
		bcantrill has opined that, had Linus gone off to pursue ice sculpture instead, at least one of the BSDs would have figured out a way forward. (Though others suggest that Windows would just have won.) I tend to agree with Bryan though. https://bitmason.blogspot.com/2020/04/podcast-if-linux-didnt...