In 13 states the deadline for petitions for specific independent candidates has already passed. But, in at least 20 states the rules clearly allow Democrats and Republicans to do whatever, whenever.
If RCV magically appeared then the Green Party would be winning this one with AOC. Most aren’t as stupid as we think. They only lack practical alternatives. I believe harm reduction would be a second choice for so, so many.
But, RCV isn’t going to magically appear; Even if a politician wanted to, none can save us from the system; And, harm reduction simply isn’t good enough anymore. The only way we progress is by doing much, much more than voting.