Haha Powerwalls storing Grid power is an even more ivory tower problem than a normal first world problem.
Assuming California is a first world state within a first world country... normal first world Californians still have to put up with PG&E, SCE, and SDG&E. And of course that means an unreliable energy availability in spite of living in one of the most technologically advanced areas of the world.
Having Powerwalls is like the first world of the first world. Our problems are basically "awww man I have too much power stored in my house now!"
On a more serious note, it is getting crazy windy outside around here. Plastic garbage bins are getting blown across the road in my neighborhood and the windows are rattlin'.