I'm not technical enough to know, but I thought, in theory, 'they' already know how to break 128-bit or 256-bit or whatever encryption if they just had enough qubits. So, to me, when the claim revolves around a certain number of qubits - like 100 or whatever, shouldn't they already be able to demonstrate supremacy in the realm say 8-bit? or even 16-bit encryption? (or maybe they do already claim this supremacy? I don't know; but would like to know). Maybe I'm wrong; but, all the hype around inevitably being able to break encryption once they are able to build enough qubits seems to be ignoring the important fact that what they are calling a 'qubit' isn't even in itself what they would eventually need - never mind how many of these proto-qubits they manage to be able string together.