Considering that she overperformed Evers by 10 in her most recent race, I don't think it's accurate at all to say that she has "no crossover appeal." Crossover appeal is not based solely on ideology. I obviously don't think she'll overperform Biden by 10, but I do think she will by 3-5%, which will very likely be enough to pull out a win unless Democrats are having a really atrocious night. Baldwin +4 is my current guess.
To be fair, Walker (a GOP titan who beat back a recall and won 3 straight elections with relative ease) was an infinitely stronger candidate than Vukmir (literally who?).
I think that explains the 10 point overperformance more than anything else, more than Baldwin inherently being a stronger candidate than Evers (I think she will perform similarly to his 2022 performance).