And consider this: with 20 minutes of previews on a three-hour movie, 10% of your experience is not the movie itself, but the trailers.
Dropping down to a 90-minute movie, that percentage rises to 18%, making a fifth of your moviegoing experience advertisements.
Long runtimes might not stop people from going to the movies if Endgame and IT’s box office are any indication, but on films long and short, it probably does detract from the experience a bit when you’re forced to sit through a half-hour comedy’s worth of trailers.