It’s not as if they want their CLI interaction to be 1-for-1 with Linux, but relatively close seems to still be a priority.
Precovid, on any conference I went to, professional or academic, the amount of Apple laptops was insane. I'm sure they're running things locally or on Linux servers, but the fact that they work pretty well between them is important.
Actually, it would cost them a lot, due to the GPL. Sure, they could try and pull a Google re: Java/Oracle feud, but I doubt they will and for good reason.
They aren't for you. Move on.
The Google bit is particularly goofy. No, "Google" doesn't even appear on the charts (you know -- the charts which Apple usually is within the top 2, often leading). Chromebooks do, sold by a wide variety of sellers, as a schoolhouse special. Their great for what they do.
IT's an trip the classic macos took before it and i think there is an signficance in apple returning to the MAcOS branding thats subly hinting that the days when OSX was an relatively open unix is ending.
And while you can still find an traditional unix(tm) box here and there in the dusty forgotten corners of enterprise serverooms(i am personally responsible for maintaining a few hpux boxen), unix(tm) certification haven't really mattered since Linux became serious business which happened around the same time OSX was launched.
What used to matter was that you could run the same CLI tooling in an macos desktop as on an Linux server but i don't think this is an use case apple see's as particularly important for the future success of Apple.