> Imagine a world where actual physical computers didn't progress to universal computation, but were stuck being purpose built It’s not clear that you need a t

> Imagine a world where actual physical computers didn't progress to universal computation, but were stuck being purpose built It’s not clear that you need a theory of computation to build a stored process computer. You might not clearly understand the theoretical capability of such a machine , but that wouldn’t prevent you from doing many useful things with it.