That's a lovely idea in principle, but rather falls down as soon as you have companies who have a vested interest in people making an 'irrelevant' choice a particular way. I doubt you could get computers to 'just work' in that way unless you had all software produced (or approved to stringent criteria) by a centralised authority and called by perfectly generic names instead of brands. And that would have its own set of unacceptable disadvantages too, of course.
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