It is not even the final 5%, it is the final 1-2%, because you need a multi-week dunkelflaute across Europe for the gas turbines to be needed in the future. A lot will also just be curtailing. For instance EV charging might be restricted in the future in such a winter black out scenario.

> For instance EV charging might be restricted in the future in such a winter black out scenario.

Or indeed when petrol runs out as happens occasionally (in 2022 most recently). Of course there's also the problem of gas supplies stopping