I agree! I found the new Dune boring, nice looking but generic (a lot like e.g. any recent Ridley Scott movie) and the actors seemed bored too. It failed to communicate a sense of wonder at the strange world. I re-watched Lynch's version after the new one, and even though the story is the same, I cared about everything that happened. I can overlook other flaws in a movie if it's at least interesting. So I think you are right, not because Lynch's Dune was a masterpiece (it wasn't), but because the new one will be mostly forgotten in a decade or so.

Perhaps the new Dune was so appreciated because it ignores the recent trend of over-complicated story telling with time jumps and mystification, and instead just tells it straight. But that's a pretty low bar.