I think that for some people, it eventually becomes a stubborn point of pride (for me, that movie is Titanic).
But for a lot of these movies, there eventually is the "event" effect where it just snowballs. Everyone is seeing it, everyone is talking about it, and at a certain point, you just kind of shrug your shoulders and succumb to the cosmic inevitability of it all, if only so that you'll know what everyone else is talking about.
Eh, I suppose. I still haven't watched
Game of Thrones, or
Breaking Bad, The Mandalorian, or more than one season of
The Sopranos. The last comic-book-turned-movie that I watched was
Wonder Woman, and the last one I actually enjoyed was
Black Panther. The last major "blockbuster" movie I watched was
Dune, and I still haven't seen the last two
Star Wars films. After a while, all of the cries of "Omigosh I can't believe you haven't seen Whatever! You totally need to watch Whatever!" just becomes background noise.
This is very much a "me" problem. I'm not implying that any particular film or television show is more worthy of attention. It's just something I've noticed about myself, that's all.