Obviously Mamdani would not win in many places outside NYC. BUT, the way he campaigns, communicates and advocates are very much needed across the board, everywhere. He's not all vague platitudes and word salad. I think Democrats could learn from him without necessarily adopting his platform.
The "platform" that has people's panties all in a wad is just a projection from FOX news.
The best part was after Mamdani gave a huge speech about being a city of immigrants and embracing all people, FOX news put up a woman who complained that New York City was not gonna be what her parents immigrated to the city for.