Can we just get along. We don’t have to like each other (as kernels), but we can exchange few tools (compatible libraries) to get the job done. Ask Oracle, Google or Amazon why they’ve made such a mess with their Linux sharing ideas on everything and in everything with bits of Java cloning here and there, JS, go and who knows what
If you insist on Linux in everything, ask Bill Gates wtf happen to Xenix. He owned and licensed AT&T UNIX . And, why MSOS, after over 30 years in OS kernel for PC biz, and the owner of UNIX(Xenix), still doesn’t have at least *NIX compatible libraries in MSOS or complete UNIX-like OS for PC called MSOX :)))
Tho, FreeBSD does have some Linux compatible libraries, that’s why one can run Linux in FreeBSD jail or use some Linux drivers in FreeBSD.
Trovalds did not make Linux kernel out of thin air and Apple OSX was not made in haven. They needed UNIX core and C to brew their own *INX, and so did *BSD
Read this so you can maybe understand what UNIX was/is and who was/is using it. Who cares what you call it. Though, it’s important which path and hardware platform you choose to make UNIX-like kernel and what audience or customer you want to satisfy with your UNIX.