You are exactly right! The "chicken and egg" problem is a large part of why these favorite language X operating systems slowly evolve into partial implementati

You are exactly right! The "chicken and egg" problem is a large part of why these favorite language X operating systems slowly evolve into partial implementations of existing operating systems. What good is the favorite language X operating system if there is no software for it? But wait a second, if the favorite language X operating system would implement these handful of POSIX APIs then look how much software could probably run with just a few tweaks. Except the POSIX APIs do not get implemented completely right. Or they suffer from terrible impedance mismatches due to the design differences or safe ideals that have to be relaxed in order to have them work. For example: Ada has unchecked conversion, unchecked deallocations, etc. Rust has unsafe. A big part of the reason that GNU and Linux have succeeded is that they implemented Unix APIs with some innovations and improvements along the way.