[hi-v-rocknroll]

Here's a better reduction of CC vs. QC: QC doesn't introduce a new type of magic computing. It only accelerates certain algorithms that a CC could also compute. The present state of manufacturing technology has relegated these to essentially toys because they do not yet contain sufficient numbers of QDs to meaningfully threaten cryptography through accelerated prime factorization or matrix inversion. And I'm sure QC devices also release magic smoke, albeit cryogenically-cooled smoke, when excessive voltage is applied. (ElectroBOOM should investigate.)