I think solar is great - I have some panels on my camper, which is very conducive to solar type use because it's already designed to function off-grid. But let's be realistic. Let's say every home in America stuck a couple thousand watts of solar power on their roof, and wanted to sell the power into the grid (as opposed of having to store it on-site). How is that supposed to work? If no power generation is required by the power company when the sun is shining, but the full normal generation is required the instant clouds sweep over a community or at night, etc, then how is that supposed to work? None of the power generation plants can function in that "instant on / instant off" type of a mode. Particularly not nuclear. The point is, once the adoption reaches some (rather smallish) percentage, there will be some major problems and costs that will have to be addressed.
Before that occurs (in the US), a lot of years will have passed. Germany has had a day with 75% renewable energy production and 50% solar production and will undoubtedly get similar occurences this year too. They also still have nuclear power plants and it all works. Sure, nuclear power plants are notoriously bad to change in output on short term and will therefore gradually fade from view, which is not a bad thing alltogether (even though I am not opposed to nuclear). New technologies will come to mitigate problems of temporary overproduction, like Elon Musk's battery pack for homes.
It is all not a problem that can be solved. The only problem is big powerful companies fearing for their livelyhood and having the money and influence to prevent these changes from happening.