>imo proof that ranked choice is absolutely needed
Ranked choice still succumbs to a spoiler effect. https://realrcv.equal.vote/alaska22 https://www.youtube.com/watch?v=yhO6jfHPFQU
Approval voting works better and simpler, and STAR voting works even better though with more complexity. https://www.equal.vote/beyond_rcv_zine
Approval makes the game theory too complicated imo. Too easy to think of cases where a voter leaves off someone because they want their favorite to win but then ends up with neither winning. STAR is the best but voters might be too stupid to figure it out. Really multi district is the best but unfortunately no chance of that happening it seems