I’ve always wondered why the price of electricity on a time-of-use plan doesn’t match this curve. Our electricity is still “peak” pricing in middle of day at the bottom of the duck curve.
Total demand is still highest mid-day, but there's enough solar being generated to lighten the net load.
But your point is basically apt: As more and more at-home solar comes online, grid-demand WILL drop during the day and pricing SHOULD drop accordingly (but we all know it won't unless the utilities get a legislative requirement to do so).
My utility has new peak hours starting around 6. I'm grandfathered in on the old plan for now, which is a difference of about $300/mo. in the summer.