The advantage of small reactors is that you can make them in factories (mass production). The disadvantages are that you lose all on site scale and you are ver

The advantage of small reactors is that you can make them in factories (mass production). The disadvantages are that you lose all on site scale and you are very vulnerable to a single part failure or design floor. Also miniaturising things is non-trivial. Then you still have all the other issues around nuclear (waste and perception) Given the cost of nuclear, you need that advantage to be much much bigger than the disadvantages. If someone can do that, they'll make (serious) money. But it's a >100bnUSD project. So I don't think there are many corps who will take that sort of risk given the uncertainty.