I think the only movie I ever watched in 3D (outside of the Hannah Montana and Jonas Brothers concert movies, but those lowkey don't count) was The Force Awakens, and that was because I wanted to see the very first showing of the movie, because I thought I would be a part of history (I was a very silly 18 year old). Don't remember the effects being that impressive outside of a few shots here and there.
The funniest thing though is that there's an absurdly high amount of 3D shows for Doctor Strange 2, and I'm 99% sure it was because James Cameron demanded it get all the 3D shows to showcase his Avatar 2 trailer. It's sometimes hard to remember he has more power than Papa Feige will ever have.