Fptp is never leaving, and the US will continue with ts rightward slide until balkanization finally separates the incompatible parts of this country they from each other by force. That being said some want to have hope things can get better, and doing the same thing that failed to work for the last 100 years seems to not be the way to do that.
In order to pass rcv nationally you need to convince either party that it’s in their best interest, and it’s simply not. By definition it takes away power from both main parties in the US without giving either one an advantage.