[SunRescue] What to do with a lowly Sun 3/50 crate?

[User Bobkeys BSD Bob the old greybeard BSD freak]

I did some digging in my dumpster diving closet, and found a lowly Sun
3/50 crate.  It seems to be all there, with 4mb on board.  What might
folks recommend to run on such a lowendian critter?  I have the usual
sunos 4.1.1U1 bits, but I was wondering if anyone had one up on NetBSD
or OpenBSD, and if so, which version with only 4mb ram?

Thanks

Bob