>so much saner than Linux firewalls it's not even close.

This is a big one for me. I've run openBSD and Linux custom boxes as SoHo routers and I just cannot stand Linux firewalls, I've never liked them and IPTables is just terrible. Yes I know there are wrappers around it now but it's still the default everywhere and still used by lots of other software like Docker. I'm using OPNSense now which is FreeBSD based instead of completely rolling my own but I love that it is still BSD under the hood.

One differing opinion I will offer is that I find NixOS to be the Linux distro most in the openBSD spirit despite it being very different from a UX and config management perspective. Alpine is interesting, but it has its own security and compatibility issues, especially around MUSL libc which I have had cause many strange downstream issues over the years, I just hit one recently in JVM GC caused by its memory allocation implementation. I've stopped using alpine altogether because of them.