Yes, existing installations get 20 years of grandfathered rates [1].

Which makes it more of a ladder pull than a rug pull...

[1] https://www.sce.com/clean-energy-efficiency/solar-generating...

That's fine. If we have enough X then stop paying people to build more X.

The first round of people paid way more for their solar panels though, and those higher prices helped bootstrap the industry. Should people who paid much less for panels get the same reward? I'm having trouble getting outraged about this, it seems to be incentives working exactly as they should.