system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5 What exactly is Technicolor? How did it work, and why did the industry stop using it?

I was watching the 1977 horror film Suspiria, which was filmed in technicolor.  It is an incredibly beautiful film, in no small part due to the vivid and intense color. I'm curious as to how technicolor and regular film differ - what makes technicolor so vibrant?
gpt
Technicolor is a photographic process used to make copies of a photographic film, usually in the movie industry to make prints of an original film for use by cinemas. It can also refer to the brand of movie cameras that used a three strips of black-and-white film with filters to produce color images, rather than the three-color film strips introduced in the mid-1930s.

Technicolor uses a dye transfer process that, although producing more vivid colors, was slower and more expensive than it's competitor processes developed by Eastman Kodak (which used . As movie theaters became more prevalent, more prints of movies were needed, and the speed/cost negatives became large enough obstacles to force the switch. Switching also allowed studios to purchase their cameras, instead of renting them from Technicolor as they were forced to do.

Interestingly, Suspiria was the last film ever to be printed in a Technicolor lab.