Except we're easily at a point now where both coal and nuclear plants can be phased out as they reach the end of their natural lives and replaced with solar + wind farms at a reasonable cost, as Germany and Denmark are currently demonstrating.

The variability problem turned out to be smaller than nuclear+coal industry led us to believe and relatively easily managed with market based solutions (e.g. ramping up/down power usage by aluminum smelters and simply building in extra capacity) rather than by building massive batteries (an idiotic idea).