While not quite a Sun system, I still have my Tadpole Viper. The only thing that runs on it in a straight forward manner is OpenBSD; even Solaris needs patch discs. I'd still use it regularly if only web browsers would work. I still prefer its keyboard and screen to anything else I've ever owned. It's the machine I was using when I finally was able to overcome my previous difficulties in learning C. And I even got to diagnose an endian problem.
I wonder how well NetBSD would run on it. There're quite a lot of current packages for it:
https://cdn.netbsd.org/pub/pkgsrc/packages/NetBSD/sparc64/10...
In general, OpenBSD/sparc64 support is excellent. Up until a few years ago, we were still maintaining high security routers running OpenBSD/sparc64 on various SPARC64 products (mostly SunFire T1000 1U boxes). Even with the additional hardening, it's often faster than even NetBSD.
> I'd still use it regularly if only web browsers would work. I still prefer its keyboard and screen to anything else I've ever owned.
You can just cheat: https://virtuallyfun.com/2024/08/12/vncfox-better-way-of-bro...