One model/configuration will never work because developers are awful, picky customers.

You’ll lose 90,000 of your 100,000 with one or more little nitpicks.

Probably 50% right off the bat because you chose a keyboard with or without a numpad.

Another huge chunk because you chose the wrong screen (Retina resolution? Low resolution? Refresh rate?)

Too bad, because I want this. Or at least the version of it I have in my head :)