Very well, it is not. But my point about it being a GNU clone still stands.

Again, unlike in the world of proprietary jails, in the world of libre software you can just recompile the software for specific dependencies. That's how GNU was ported to Linux. Again, before that it worked on Unix. It had to be rewritten for Linux specifically because Linux is not the same as, say, a FreeBSD kernel. In fact, if Linux did not exist, GNU software would probably have been ported to the FreeBSD kernel. Is it a better universe? Maybe. Maybe… BUT IT'S TOO LATE.