Like IRV, it’d help address the ‘spoiler’ issue where an emerging constituency is essentially penalized for growing strength, by sabotaging the major party clos

Like IRV, it’d help address the ‘spoiler’ issue where an emerging constituency is essentially penalized for growing strength, by sabotaging the major party closest to them. This, and IRV, instead gives them positive influence in proportion to their growing strength. As such, also like IRV, it doesn’t totally end tendencies towards two major parties. Even fully proportionate representation systems often trend that way, and such coalitions aren’t all bad: they help sinplify choices, making the outsones of elections more gradual and predictable, and make it more likely some stable coalition that together represents a plausible majority can form a working government. But it still creates new competitiveness around the edges, that single-member plurality suppresses.