Chill, no need to be stressed. Part of the ideas you mentioned are already implemented in some cases, but they are not without drawbacks. Pumped hydro is good, but has high maintainance costs, messes with the fish and requires large bodies of water, how do you get tbat in the desert? Flywheels have good inertia, great for stabilizing the grid, Ireland has some for that exact reason, but can’t store a whole lot. And heating up roxks and sand may work if you need heat at night, but you need electricity, so you need water to turn into steam to produce it. Sodium batteries look the most promising, we’ll see how they develop. But until we get these storqge facilities built, adding more solar would only destabilise the grids even more.