Electoral impact. Nothing matters more when it comes to ensuring that representatives are accountable to their constituents. 

If election outcomes depend on political performance, elected officials have to listen to the voices of the voters. With our two parties that feel separated by an ideological chasm, we'd rather vote for a bad team member than a member of the other team.

But, with ranked choice voting and multiparty democracy, voters can express their preferences for a better candidate without feeling like they're voting for the opposite candidate.