* What you mean, but conveniently left out, is that nuclear reactors that are written off are competitive. Until they get too old to fix, then they're closed. That's what's happening at the moment in the Western world whether we like it or not.
When you talk about newer reactor designs, you are not talking about commercial reactors, but research reactors, for which the true cost/potential is unknown.
Nuclear isn't a good match for PV and wind, as those are cheaper when they're on. So you have a huge capital investment but only a low realized capacity factor.