Didn't expect to see RenrakuOS mentioned in this thread -- hey man! I actually started playing around with some ideas for a modern follow-up recently, stealing a lot of concepts from Redox. Maybe once it gets off the ground, I can rope you into working on that OS too, haha. (For those who are curious, RenrakuOS was a pure-managed (.NET) operating system from the late 2000s: https://github.com/daeken/RenrakuOS It could run on top of a desktop .NET framework, or compile to native code and run bare metal, even including some basic networking support and such. Ended up dying mostly due to me getting too busy with startup stuff, but also it had a lot of poor design decisions, e.g. a broken process abstraction.)