A few months ago I would have told you quantum machine learning was mostly hype dressed up in cool-sounding words — "superposition," "entanglement," "quantum advantage" — thrown around papers that never quite show you the number that matters. Then I built one of these systems myself, for something that actually has stakes: classifying brain tumors from MRI scans. And I came out the other side with a more interesting opinion than "hype" or "revolution." It's somewhere in between, and the in-betwe...