You can't adequately model energy with a single price per MWh. There is more to it than that and that is true of all energy types. But the low cost of renewables is still a feature that grids can exploit. It will make storage viable when it otherwise wouldn't have been.

No source of energy is a silver bullet for climate change. Wind and solar aren't. And neither is the nuclear industry. There just isn't a serious plan for scaling up quickly enough. The supply chain and expertise just doesn't exist and will take years. And moaning about mistakes in the past is irrelevant to the present.