My argument was purely theoretical. I fully agree that analog computers currently have more practically attainable advantages over digital computers. I'm also l

My argument was purely theoretical. I fully agree that analog computers currently have more practically attainable advantages over digital computers. I'm also less confident than most people of quantum computers ever overcoming the practical problems, some of which you mentioned. But I do not doubt that the physics itself offers superior computation, even if we may never access it. > we are able to measure real numbers I disagree with you here. I like to believe in the Church-Turing-Deutsch thesis, which implies that reality is ultimately discrete and real numbers are nonphysical. The example you give, time, is indeed a real number in our best models of physics. But this is mostly because we don't know how to quantize it yet. It's one of the biggest open problems in physics. That said, the outcome could indeed be that it is a real number and CTD is wrong.