It's nuclear fission. It's always been nuclear fission (well, at least since the '50s) and it will continue to be until we commercialize fusion reactors. Everything else is nice to have but it's like NIH syndrome.
replies(6):
Maybe SMR's, thorium, 4th gen, etc will work out, but maybe not.
In any event, if your more general point is that naval reactors indicate its possible that SMRs can be built on time and budget, I don't disagree. It certainly is possible. NuScale was the furthest along of the SMR companies and had their project implode before it got off the ground. So, its also possible for them to crash and burn.
So, I'll stick with my classification of SMRs as "maybe it will work out, maybe not".