Though it can be jarring: Eg. Silence of the Lambs or Leaving Las Vegas.
The Onion had a good take on it:
https://theonion.com/wildly-popular-iron-man-trailer-to-be-a...
I avoid trailers like the plague. When reading reviews I'll skip most of it. I want to know the gist of the plot, and I want to know the summary.
I enjoy movies so much more this way. Sure, sometimes I end up watching some duds, but most of the time I'm really engrossed and I love the surprises.
If I watch a trailer, especially the modern 5-minute condensed versions, I find it takes away >90% of the excitement. Doesn't matter if the movie comes out next year, the trailer will come back to me and I will recall the spoiled plot points.
You can pick movies by looking up the film in wikipedia and immediately jumping to "critical response" without reading anything else.
(though I should have paid MUCH more attention with megalopolis)
Haven't seen the film, but read the book. I got what was being depicted (mostly), but yeah, it shows without revealing.
It helps that the story doesn't revolve strictly around action and combat, which many blockbusters do these days.
Knowing nothing about what I’m about to watch is my favorite way.
Trailer ends, and I know all I need to know about the film. The plot is known, the story is more or less obvious. Pick another film, repeat, same thing.
Result: do something else entirely, or watch comfort series like Star Trek, where it doesn't matter that I remember the plotlines.