When one can’t function without the other.
I mean, that’s the general gist of what I was going to write, how powerusers can tweak their systems so thoroughly that the things they do with it depart hilariously far from the standard package. And, in one way this is true. Nobody else is going to get the same type of efficiency of use as the one who set that up in the first place.
But in another way, they’re unlikely to have stripped the system of its very core functionality? I’ll still always have a mouse connected to my machine, and it’ll still function as any other. My laptop still has a normal keyboard, and you have to actually try if you want to hit my weird key-combo triggers.
So, uh, you never know what other people’s machines are really like I guess?