Placing some bets on nuclear make sense (France gets 80% of electric generation from nuclear) but counting on nuclear is risky because nobody can make nuclear plants cost efficiently anymore. America should probably keep trying on a small scale and if they can figure it, then ramp up. The big problem is that nuclear is essentially a big government project, and America is very bad at those.
With one exception (Flammanville, 11 years over schedule and 400% over budget) no new plants are planned.