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> solar camp likes to tout how it took a decade of subsides before economies of scale kicked in - no reason to believe nuclear wouldn’t come down with same kind of subsides - on a longer scale due to longer iteration cycle.

There is: nuclear has been subsidized on a much longer scale than solar already.

Please share more information. What subsidies existed for nuclear?

Well, since nuclear plants cannot be insured these costs as well as the waste cost are mostly carried by the state. There are various calculations on these costs online. Not sure about other costs, but I'm sure there are more (e.g. security for transportation)

The problem is that we don't have another forty years to wait for nuclear costs to come down if we want to prevent catastrophic warming.

Nuclear already had those subsidies, in spades. Costs didn't come down.