What the Hell Was in the Water in Minneapolis?

Minneapolis in 1984, the year Let It Be, Zen Arcade and Purple Rain came out:

The artists themselves might never have wanted to leave their shared hometown in the middle of the country, but their ideas stretch beyond its boundaries and backgrounds. Hüsker Dü wanted to take hardcore and make it art; The Replacements wanted to use punk rock as a springboard to being the greatest rock ‘n’ roll band in the world; and Prince wanted to redefine pop, shaping everything in his vision and coloring it all purple. They didn’t necessarily have a great deal in common. But all three changed music forever from the same few postal codes.