>Simply asserting that "strong motors are expensive" doesn't answer the question. If expense were the determining reason in the past, then no one would make/buy

>Simply asserting that "strong motors are expensive" doesn't answer the question. If expense were the determining reason in the past, then no one would make/buy them today either. This assumes that stronger motors aren't cheaper today than they were, relative to weaker ones. I think that there are also advances in robots and toys that it seems to me should have been possible decades ago (even with slower processors)