Some theaters are not equipped with digital projectors. They must use film. So, that film has to be printed.
Technicolor never did provide the film for movies. That came from Eastman Kodak. Technicolor is the printing process, usually to Kodak positives.
Some directors are always saying “We absolutely needed to shoot this movie on film.” Enough directors or movies that film won’t entirely die, but probably not enough to keep Kodak or Technicolor in business.
I wonder about how films are shown in other, “less developed” countries. They can’t all be streaming, can they? So there must still be some demand for film and film processing in the global market?