Wiki has a great quote: If you have good light and you’re at a fairly high shutter speed, it’s going to be a brilliant color photograph. It had a great color palette. It wasn’t too garish. Some films are like you’re on a drug or something. Velvia made everything so saturated and wildly over-the-top, too electric. Kodachrome had more poetry in it, a softness, an elegance. With digital photography, you gain many benefits [but] you have to put in post-production. [With Kodachrome,] you take it out of the box and the pictures are already brilliant.
For decades, Kodachrome was the go-to color slide film for photographers. It was a pain for developing, but you couldn’t beat the results. So any number of scenic areas get named for the film that captured their beauty.