Linux isn’t UNIX and doesn’t even pretend to be. Rather than calling it such, I think it’s more useful to just forget about UNIX, which was a proprietary OS to begin with. Of course the owners of the trademark get to decide who gets to use it.
If you have to call Linux something other than Linux, you can always call it POSIX compliant, which it mostly is (MacOS however is actually certified here too).
Frankly, you’re wrong.
Linux isn’t UNIX and doesn’t even pretend to be. Rather than calling it such, I think it’s more useful to just forget about UNIX, which was a proprietary OS to begin with. Of course the owners of the trademark get to decide who gets to use it.
If you have to call Linux something other than Linux, you can always call it POSIX compliant, which it mostly is (MacOS however is actually certified here too).