I did. I like it. It feels very clean and well engineered, I always manage to break it via updates though (freebsd-upgrade vs ports vs pkg) Apparently pkg-ng and ports are linked via a central database though now, so that should not be the case any longer. As for why? I disliked systemd and was told to "evolve or gtfo" so I gtfo since I didn't like the way it was being forced on me and the few gripes I had with it fe…
Boot environments on ZFS with beadm provide a brilliant way to protect against catastrophic updates. I don't know of any other popular OS that offers something comparable.