It just a better democracy because it's more representative.
It's solves the "wasted vote" problem people have with democracy and why many democracies result in a two party system. This way it ensures your vote is counted and multiple parties exist.
Actually, that's a form of Proportional Representation. What's being adopted by NY still results in one winner, not a percentage of seats awarded based on the percentage of votes a party got.
Instant Runoff Voting is essentially STV in the degenerate case of single seat constituencies rather than multi-member ones. So you're both right! It is in some sense the same system, but it plays very differently in that the results are majoritarian rather than proportional.
Generally, I think it's accepted that IRV is a good choice for multi-member elections. But for these kinds of US single-winner elections, that's where its flaws come out.
STV Explained -- https://www.youtube.com/watch?v=l8XOZJkozfI
It just a better democracy because it's more representative.
It's solves the "wasted vote" problem people have with democracy and why many democracies result in a two party system. This way it ensures your vote is counted and multiple parties exist.