Nah, a generation grew up with the MCU films, they will remain in their minds for the rest of their lives. The films you mentioned are probably the ones you grew up with and the ones that you use as benchmarks. The generation before that was Star Wars, before that it was historical epics, etc etc etc.

Just like with music, "the best" is often the things you experience in your mid-teens to mid-twenties. And when you grow up you'll develop some more critical thinking and may appreciate older or newer things.