Of course we need to scale up a huge amount. This is a work in progress. We need to not waste all the green energy when it is in large supply and use it when needed.Now the total load they need to support. It's a drop in the bucket and not centralized where needed. Just like EVs solar and wind take a hit in the winter.
When I worked for Gould/GNB we made backup power storage for ATT and other telecoms. Some were huge lead acid cells as big as a 6 ft man in arrays underground as big as foot ball fields. When the AGM batteries came out we were making them to fill up huge warehouses. This was all just for telecoms.
You have no idea of the scale that is needed. And we already shut down 80% of the coal plants.
Switching from wood to coal was a big transition. Switching from coal to gas was too. Electrification was a huge undertaking. New things always are.