If the EU and US would each commit to build, fund 100+ NPPs over the next years then it would make sense to gear up for a scheme.

Unfortunately each plant is a fucking special snowflake. Due to new sites somehow requiring changes which is absurd, since the containment and everything under it should be 1:1 copy, right? Yes, because the NRC doesn't work like that. Designs are tweaked.

Anyway as you said it's a very expensive bespoke weld and pour festival.