Look at the Time of Use plans that CA IOUs have on offer and you can see why this is happening. Most of them only have 2 modes: high and low, with only 4-9 as peak. If they actually wanted to manage the duck curve, they could easily put a steep discount at the hours when the problem is most pronounced, and promote EV charging, laundry, etc be done during those hours. This is just another example of the IOUs failing to innovate, their captured regulator doing nothing about it, and ratepayers continuing to pay more for all of it.