> NTFS is probably the most portable other than FAT

It wasn't even designed to be portable, the only reason why it is is because Winfags couldn't live without Windblows compatibility while switching to any Unix OS, so they hacked their way into portability, which by itself took many years to accomplish too.
Thoughout the 2000s NTFS didn't work on Linux at all, and they only achieved read only capabilities by the late 2000s or early 2010s.

> All of them have it other than OpenBSD.

Better yet, Theo even made fun of FreeBSD for adopting a COCk, which is a good sign because it already shows that OpenBSD won't have one for the unforseeable future.