I run it. Home firewall, office desktops and laptops. It's pretty stable and I'm fairly familiar with it. Really simple if you know Unix. I hope it never goes away, not sure what I would replace it with. Linux is so complicated now, it's just too much for me to deal with
Yeah, I also use it because it is fairly low maintenance. There's the sysupgrade every 6-month, but it goes smoothly every time.
What software do you run on your desktops and laptops?
If OpenBSD dies (somehow, at this point so many things are maintained there (OpenSSH, LibreSSL, PF, Tmux, sudo kinda) that it'll always exist to a degree) one of the other BSDs will suffice. FreeBSD is bloaty but for the most part works fine enough