> Adding millions of electric cars in a short time would be a problem for sure, and it would likely lead to coal and gas turbine power plants as those are cheap and quick to set up.

In LCOE (Levelized Cost of Energy) terms new coal plants aren't cheap, in fact they are much more expensive than solar and wind [1]. New combined cycle gas plants are cheap, but the global natural gas price spike has changed the opex situation considerably, so LCOE will trend upwards.

EVs are actually a great match for intermittent renewables since they provide their own storage, and are therefore time dispatchable. They are also usually charged overnight when wind is typically available and demand is lowest.

1. https://www.lazard.com/media/451905/lazards-levelized-cost-o...