[maegul]

Perhaps a bit too scandalous (I don't know), but my understanding is that there was also a falling out of sorts between the DragonFly lead and BSD people, largely caused by allegedly abusive behaviour form the DragonFly lead while they were still working on BSD main. As I understand it, DragonFly came after this. Maybe doesn't answer your question, but it contextualises (however accurately!) part of how it came to be.

My source on that is a LinuxConfAU talk I can't recall off the top of my head (the same speaker gave a somewhat notable talk in defence of SystemD)

[nix23]

Benno Rice -> "The Tragedy of systemd" OR "The Trouble with FreeBSD"

I am a bit torn apart about him, he's half right half wrong, anyway it's good to have discussions like that.