Another reason to like Tim Walz. He has openly supported RCV: https://www.rcvbloomington.org/supporters
Except it doesn’t, because you’ll end up boxing out voting populations that are significant, but spread evenly and thinly across your whole legislative area. If there’s a voting block that is at 20% everywhere, they will never elect their preferred candidate, because they’ll never have a majority in any district. Gerrymandering will always be a problem with single-winner districts, because the definition of fair districts has multiple inputs, and there’s no consensus on how much priority to give to each.
If that 20% is evenly distributed everywhere, then they don’t need their own local candidate. That’s like having the men’s candidate or the left-handed candidate.
They won’t have any candidate. Regardless, the same problem applies. If these people are spread out unevenly, there will still be voters in districts without representation. Their rep won’t give a shit about them because they vote for a different team, and the rep on their team but in a different district will care mildly at best because they can’t actually vote for that rep.