Dug out my old usb audio device and now my Plan 9 raspberry pi can play music. 💯
Lots. 🤣 The system is small, coherent, and understandable in a way no modern unix is. The namespace operations remain incredibly powerful. And several of the tools built on it, like the way network listeners and the mail server are built, are just much nicer to use, modify, and build on.
Lots of downsides, too, but overall I still find it the most comfortable environment for anything that doesn’t need a web browser. :-)
Oh, me too: FreeBSD, macOS, and Solaris in server environments extensively, and Linux, AIX, HP/UX, Irix, probably others I’m forgetting. Plan 9 is a whole other class of thing.