Well, newsflash: Renewable energy can be so cheap it can already beat fossil fuels depending on location.
The most notable examples are in the middle east, where they sometimes use solar panels for the installations to pump up oil! You gotta love the irony in that!
And they only care about what is cheaper to run. Same for two cases of new powerplants in Middle East and India. They had an opening for a new powerplant, and solar won, just because it reached the lowest price per kWh. Completely no subsidies or governmental policies involved in that choice.
Of course those are sunny locations, it would probably not apply where I live in terms of Solar. But here, after having many years of subsidized windmill farms, now windmill farms are being built without subsidy (because of the improvements)
Then, if you see the South Korean windmill project costing 43 billion dollars and providing a 8.2GW capacity.
Hickley C reactor costs 30 billion dollars and provides providing only a 3.2GW capacity.
In my opinion, I don't really like nuclear that much, but I still see the relevance for nuclear.
But also in my opinion renewable energy will become cheaper and cheaper and it will be globally adopted just on cost basis. No subsidies or policies.
Whether you like it or how clean it really is. Same goes for electric cars (turning point is almost there). You can discuss how much cleaner it really is, or the externalities, but if a tech is cheaper to run, people and business will use it.
Of course, governmental policies will only accelerate it.
This turning point is in some cases already reached (as given the examples above)
And yes, wind and solar are not constant. However, nuclear is very constant, not as flexible as a gas powerplant (which is the most flexible)
In my opinion we will have a future with mostly renewables, perhaps still a little fossil, but a baseline of some nuclear power. Combined with lots of energy storage for peaks.