Look at how *nix, Windows, Sun, BSD, Chrome OS (which is basically a linux anyways) all use Ctrl, Meta (alt), and Shift for their hotkeys, compared to how Mac uses Hyper (cmd).
Also look at how Mac has one instance of an app's tool bar/menu that all windows share.
I'll agree that the consistent UI is a boon, but there's a large lack of discoverability imo, and some things that are just entirely lacking, like the ability to move windows around with hotkeys.