It isn't a problem as long one understands the difference between UNIX and GNU/Linux.

For me Linux had been mostly the UNIX that we have back at home, while most work was done in Solaris, HP-UX, Aix, DG/UX.

I am not attached to Linux specifically.

The thing is, I'm not talking about POSIX or CLI; I'm strictly speaking about the desktop GUI. macOS keeps going into a direction which is actively preventing being efficient with it, all the while making weird net-negative decisions about looks for reasons which can only be explained by UI and UX designers trying to sell themselves as useful internally. I used to be an early adopter, now I'm waiting for the enterprise-forced upgrade of major versions, which is the only reason I'm upgrading at all.