Unfortunately it really doesn’t. And it’s actually Linux that’s the bigger problem: whenever it decides to updates GRUB it looks for OSes on all of your drives to make grub entries for them. It also doesn’t necessarily modify the version of grub on the booted drive.
Yes I’m sure there’s a way to manually configure everything perfectly but my goal is a setup where I don’t have to constantly manually fix things.
Honestly if you buy a Mac give macOS a try. It’s Unix based so you’ll feel at home in the command line. It doesn’t come with a command line package manager but there are two popular ones you can install (homebrew and macports).