SMR's have neither of those economics of scale. Ontario is building 4, and there's a couple others at similar scale. Nobody is contemplating the thousands you'd need for the scale necessary to make the switch from bespoke to assembly line worth it. So the worst of both worlds.

And the risk with bespoke but still much higher numbers than regular plants is that you will need all of the overhead for a much smaller amount of output and you'll definitely not have the same QA budget that you have for a much larger plant. Prediction: many small failures. Hopefully not a 'small Chernobyl'.