There's definitely some of that going on.

I've gotten the same feeling watching old movies a second time.

I would watch a movie when I was young, and it just came out. It would be "modern", maybe state of the art, and it would have an impact on me. But I was young, and easily impressed by the cliche or trite.

And then I would watch the same movie decades later. Times changed, the art has changed, casting, pacing, effects have all advanced to support the storytelling. And I am older, a different person, and maybe more aware of what is "timeless" with a little more experience under my belt.

It might be a historical deep dive, but compared to the available material our present has, some older media should drop off the list.