Democrats spent their entire life understanding what FPTP is and their entire political understanding hangs on explaining it to other people any time Democrats get criticized.
Democrats hugely benefit from FPTP so they will never advocate for replacing it.
Key point, Newsom of California vetoed a bill to enable more ways to vote then just FPTP.
FPTP is in the benefit of both parties. It rallies and polarizes so any other idea besides "Let's not find war, let's fund education and help people" is considered too unpopular to win.
More than 17 years after San Francisco approved ranked-choice voting over the objections of then-Supervisor Gavin Newsom, California’s first-year governor got a chance for some payback, vetoing a bill that would have allowed more cities, counties and school districts across the state to switch to the voting system.
The bill, SB212 by state Sen. Ben Allen, D-Santa Monica, was overwhelmingly approved by both the state Senate and the Assembly. An analysis of the bill found no opposition.
“Ranked choice is an experiment that has been tried in several charter cities in California,” Newsom said in his veto message Sunday. “Where it has been implemented, I am concerned that it has often led to voter confusion and that the promise that ranked-choice voting leads to greater democracy is not necessarily fulfilled.”
I will advocate to replace it when I'm in office and a Democrat, against the protests of some of my co-workers. As the other commenter pointed out, Newsom killed an anti-FPTP bill, but that means there's enough support in the California legislature to get a bill to his desk.