> those are things that computers can do, it just costs a lot One could travel between continents in minutes on an ICBM with a reentry vehicle bolted to the fr

> those are things that computers can do, it just costs a lot One could travel between continents in minutes on an ICBM with a reentry vehicle bolted to the front but we don't because it's too expensive. It's a perfectly reasonable constraint to demand that a technology be cost effective. Otherwise it has no practical value.