The "Guess I'm Dumb" AI vocal is the real failure. Those interval skips are ALL about air, and with no air in the voice, is just doesn't sound good. And that is a gorgeous song/record. The novelty value of the AI vocal is high, but it is value removed, not added.
The technology is still primitive, but it will likely get there someday. After all, humans were once themselves struggling to get out of the primordial ooze, and look at us now - we are the very definition of humanity!