My vote in MA is not mathematically meaningful today, as you could correctly call the 2020 presidential race for blue back all the way back in 2016.
Change the voting process and I could vote for Party Q, then F, then D and have something closer to my true preferences be measurable vs today and give the parties a sense of where they stand with the populace. I’m still not convinced it breaks the binary star in US politics.
Right now, if those are my prefs, I have a choice of voting Q, voting D, or staying home. If Q is a third party, there’s an argument that vote might as well have not been counted or cast (because from today’s voting you can’t infer the true level of support for Q because some Qs cast their ballot for D just on the off chance that R would otherwise win; for the same reason, you can’t tell as much about the true R or D support either).
