Serious critics of solar (and wind) power where never about price[1], they were about about availability and, as expected, with the growing share of wind and solar in the electricity mix the grid is getting more and more disturbed when the wind doesn't blow or the sun doesn't shine for a few days.

[1] in fact, price is a terrible metric when talking about electricity because you can't (realistically) store it, even today. Price only make sense when you have a bunch of fossil fuel power plant sitting idle, waiting for the break-even price to happen before adding their power to the grid.