First proof that infinitely many prime numbers come in pairs (2013)

It's possible that a random new movie will be better than a random movie in the past, but you're not talking about random low-budget ones, you're talking about high-budget ones. It's not like they didn't have some big budget films in the past, and I doubt a "better understanding of filmmaking and storytelling" is responsible for more enjoyment of current things. Also, I'm more referring to even movies from 5-10 years ago, which don't suffer from lack of technology in general, or most of the other reasons, and yet there doesn't seem to be as much consumption of them than the "new thing". Personally, I'm fine with consuming old media, but the world doesn't seem to share that with me, and I don't fully get why.

There's also the availability of extensive ratings for past media, which means you can pick and choose the good ones, something harder to do when picking stuff still in theaters.

As a counterpoint, I do enjoy sequels of things I've previously enjoyed (and understand the sequel effect), but that doesn't seem big enough to account for the general phenomenon either.