@Humpleupagus
Yes and no.
We've seen problems like this going back to the '70s. And it has nothing to do with "fossil" or "renewable".
It has to do with the fragility of the grid, and how bringing a power station back onto the grid suddenly can trip all the safety features which causes a cascade of failures to being with.
The problem with "renewables" is that you don't have the flexibility to "pour on the coal" to make up for losses due to losing one of your plants