IIRC two states and several major cities have also successfully implemented rank choice, and in every case it’s been because of Democrats.

As more and more local governments make the change, it’ll become more popular and gain more support on the national level.

The problem is that any third party that manages to eventually displace a member of the duopoly immediately replaces that party in the new duopoly.

Because the duopoly is a result of First Past the Post (FPTP) voting. As long as we use FPTP the duopoly will persist, just with different parties filling the two roles.

Anything short of switching away from FPTP for some form of Rank Choice is going to be a band-aid, mere temporary relief, and not even a very good one.

You’re 100% correct, but don’t think that’s enough for Meta. It’s inherent to the nature of corporations to sell to grow, ie increase market share. If Meta thinks it can increase it’s market share, even a little, by destroying mastodon.social it will.