Haiku
To (sort of) continue the vintage computing vibe, I have been playing with Haiku.
To quote the web-site, "Haiku is an open-source operating system that specifically targets personal computing. Inspired by the BeOS, Haiku is fast, simple to use, easy to learn and yet very powerful."
I am currently running Haiku in a virtual machine (using Quickemu) on my NixOS Linux laptop.
The standard Haiku distribution comes with a reasonable number of applications / demos and a lot of documentation.
To allow software development the system comes with a C compiler and Python already installed. Bellow is a quick test of the C compiler.
The standard distribution of Haiku does cover all of the bases to be a "daily driver" but does come with a usable web browser called Webpositive and has a "software store" called HaikuDepot where more software can be installed.
Haiku makes a nice change from standard Linux distributions while still having some familiar touches, for example it uses bash and gcc. I will continue to use it.
I would like to also try it on real hardware at some point, watch this space!