I saw this late last night and was amazed and happy, but the numbers were not out yet. 59-41 is pretty decisive. I think, in part, it is a backlash against the out and out cruelty we have seen since Roe was overturned. Republicans have been in a rush to see who could be the cruelest in making no exceptions, including defending the idea that a 10 yr old rape victim should be happy to give birth to her rapist's child, that even ectopic pregnancies should continue to the point of threatening a woman's life, that a woman's life has no value except in giving birth even if it kills her and making no pretense that birth control will be next on the chopping block and so on.
What I foresee happening next, though, is that they are not going to allow people to vote on it anymore. They were overconfident and felt that they had a slam dunk. I think they will next say, "You've made your wishes known by selecting your representative and therefore WE will make these decisions." This will be because gerrymandering gives them so much more control over it than allowing the public to decide.
Congratulations, Kansas! Good job!