NetBSD still has code for various interesting^W older network protocols such as ARCNET, Token Ring, FDDI, HIPPI, and Strip.
The code is quite old and the drivers are not MP safe, so its being proposed that the code be dropped, with the understanding that if anyone wanted to step forward to update any of the drivers that would also be fine. Just in case anyone has the right kit and some itchy coding fingers :-p https://mail-index.netbsd.org/tech-net/2020/01/date1.html David