Ahh but is a "quantum computer" built out of macroscopic exploding toy balls "truly" a "quantum computer" at all? Maybe Joy would claim it is in fact a classical computer using topology and thus, to follow through, that so called quantum computers are themselves merely sub-microscopic classical topology-based computers not actually "quantum computers" at all. Wordgames. That doesn't alter the idea that whatever we call them Joy's ideas ought, it seems, to permit of scaling them up?