Where is Richard Stallman when you need him? This thread seems indefensibly void of "free" vs. "open-source" software ranting. (Seriously though, the restrictive license on this is really a bummer.)
> Seriously though, the restrictive license on this is really a bummer.
I question how much it really matters. If you wanted to create something like xv6 (the x86 remix of sixth edition Unix), you wouldn't want to keep too much of the original code anyway, would you?
Most of the C code I saw there are full of ancient practices, for one, I haven't seen a single #include in about ten or more files I looked at (IDK if CPP existed at all).
I believe this would be closer to "Shared Source"[2] than anything else.
[1]: https://opensource.org/osd-annotated
[2]: https://en.wikipedia.org/wiki/Shared_source