[0] https://en.wikipedia.org/wiki/Cost_of_electricity_by_source [1] https://www.businessinsider.fr/us/solar-power-cost-decrease-... [2] https://www.lazard.com/perspective/lcoe2019/
You're right that solar has become very price competitive. We're pushing that at Tesla & I do think as the current regulatory environment around nuclear continues to stay roughly the same, solar will be much cheaper in the coming decade.
It should be noted that subsidies, regulatory fees, and economies of scale play a MUCH larger role in the LCOE of energy sources today than the fundamental physics, efficiency, material costs etc do.
Therefore it is wiser to look at the options from a first principles perspective and consider the potential costs of sources after equally large effort is put into scaling and optimization, and ignoring political factors. When you analyze the options in this way, nuclear wins every single time.