Going 100% renewable is going to require an immense amount of storage, nevermind their instability. Any base load we can replace with nuclear is going to lessen that burden.
EV’s are heavy and require a ton of rare Lithium.
Using over capacity to generate hydrogen seems to me like a way to solve that. Hydrogen which in turn can be used to power cars, trucks, ships.
I don’t see how nuclear would slow the transition away from oil and gas.