That's really why states can't do universal healthcare on their own. It is too easy to move between states to find the best deal.

Exactly! I moved out of CA at the end of 2020. I've recently retired, and have structured most of my spendable income in retirement to be tax sheltered, so if this passes (and depending on the taxation specifics of this plan, if it passes, vs my retirement income stream), it could easily make sense to move back: no more COBRA or other unsubsidized OOP health insurance payments for us!

Of course, even if the proposal becomes law, it might take a decade or two to come into full force (someone else mentioned CA's High Speed Rail project, but healthcare as it exists today is a far larger Gordian Knot), so I think I'll watch from the sidelines to see how such a grand plan works out in reality.

Agreed. Very unfortunately, this is why these solutions can't work at the state level. It needs to be country-wide for it to work.

Same with e.g. homelessness solutions.

Don't steal my idea! California is one of my retirement choice!