Ok, here's the blog post!

If you've wanted to party like it's 1994 and experience life on planet #Unix _before_ Solaris, why not try a bit of #RetroComputing and try #SunOS 4 on an emulated #SPARCstation 5? https://apintandaparma.club/cos/falling-down-a-rabbit-hole-of-nostalgia-episode-1-sunos-4