Even that isn't true, at least for pure public domain without a fallback like the CC0. Some jurisdictions (like Germany) don't allow authors to place their works into the public domain.
429 karma · joined June 5, 2021
The bigger problem is that glibc cannot be statically linked properly. It dlopen's some libraries, like for NSS. Maybe games could avoid triggering those cases but musl is definitely better.
While syscalls themselves are backward-compatible (even for faulty behavior), I think I've read somewhere that some parts of DRI are not, but I've lost the source on that.