The corollary of that line of thought though is that by preventing tech companies from dabbling in microprocessors you reduce competition in the microprocessor space- a sector which has proven very prone to the formation of monopolies/duopolies. If anything, we want to encourage more new competitors in that space, not fewer.

Also, it’d be essentially arbitrary. Is it OK for Apple to design its own microprocessors, but not Amazon- and if so, why? Is Google allowed if it uses them in phones like Apple, but not if it uses them in data centres like Amazon?

What with Trump recently declaring (in his usual completely coherent and not at all deranged manner) that Google Are Bad, the Supreme Court might not necessarily be feeling so keen to help out on this one.