As a Californian who has been watching the CalISO web page since the 90s, what I find most interesting is that the peak usage and total generation now is pretty much the same as it was in the 90s (~50MW).

Based on the energy mix, it looks like lost coal capacity has been replaced with solar and other green energy, and demand has gone down relative to population because of efficiency initiatives and rooftop solar for the largest home consumers (rich people).

I'll bet demand falls even faster as home energy storage gets cheaper and more prevalent.