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