Not sure what this means, but on my Linux desktops I have absolute freedom to make my keyboard and mouse to do just about anything I can dream of.
As well as Double/Triple-click+Drag: it should select additional units not letters. > Support for Alt+Dpad(+Shift) and Command+Dpad(+Shift) is important IMO. On all systems, it can be combined with Shift to highlight the word. Jumping words is done with Ctrl+left/right arrow in Windows and Linux. > Word and like jumps in Windows also felt backwards to me.
On macOS, Apple does not strictly enforce Cmd+, for opening preferences - any macOS app can use that for whatever they want. If every app on Windows and Linux decided to use the same exact shortcut for opening preferences, then we'd have that. The point though is that this is an app thing, not a macOS thing. To be fair - I assume the web page was capturing that shortcut. I just tried this in macOS (Catalina), in Chrome while I happened to be looking at a design page in and nothing happened.
Command+, to bring up preferences is surefire, does linux/windows have the same yet?