It's not about the cost, it's about the availability.
Go look at the percent generated by source and you'll see how far off we are from phasing out fossil fuels. Couple this with the projected usage of electricity in the coming years and the outlook is that much bleaker.
Citation required.
> The future of renewable energy isn't quite there yet.
https://en.wikipedia.org/wiki/Cost_of_electricity_by_source#...
You were saying? Wind and solar, cheaper than all fossil fuel sources for almost ten years now.
The cost of solar has plunged by a factor of almost 6x
https://upload.wikimedia.org/wikipedia/commons/thumb/7/7c/3-...
Offshore wind is the most expensive renewable and is surpassing the cheapest fossil fuel source.