Not the OP, but my guess is "nostalgia". I'm sure there were people who insisted on using horse driven carriages, long after automobiles took over. "It's just

Not the OP, but my guess is "nostalgia". I'm sure there were people who insisted on using horse driven carriages, long after automobiles took over. "It's just the proper, cultured thing to do. And you can tip your hat to other passing carriages! The shared feeling!" Although note that sentimental items can have a value of their own. Cinemas could perhaps even increase the ticket price dramatically in that world, making it a "luxury item" on purpose. "Tell her the depth of your feelings with a real cinema ticket". Remember diamonds?