I'm assuming you're referring to the physical difficulties of creating such a device, since the theory has been there for a while now.[1] I don't know why you'

I'm assuming you're referring to the physical difficulties of creating such a device, since the theory has been there for a while now.[1] I don't know why you're saying this isn't a "legitimate complaint" (or what even gives you the legitimacy to criticize such things), if anything this is just as, if not more legitimate than your comment. Time and time again people thought we didn't need to worry about bigger registers/more memory/int overflow/screen sizes/etc. and they were proven wrong every time. Given everything we know so far and everything we've achieved in this field, I'd bet my money on the fact that we will have such capable devices in the future. 1. https://en.wikipedia.org/wiki/Shor%27s_algorithm https://en.wikipedia.org/wiki/Shor%27s_algorithm