Yes, I have no doubt we can hit even a 90-95% renewable grid. It's the last 5% that is impossible to do without gas.
The cost of those last few percent is absolutely eye watering. The current plan to get it to 100% net zero is by having gas for the final 5% then using carbon capture and storage to offset the emissions.
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.
The cost of those last few percent is absolutely eye watering. The current plan to get it to 100% net zero is by having gas for the final 5% then using carbon capture and storage to offset the emissions.