Whether or not you think they're good (or started off good then went off the boil) shows like The Sopranos, Mad Men, Breaking Bad, Succession, Better Call Saul, Game of Thrones etc. are bigger cultural landmarks than most mainstream films have been in the last two decades.
And economically speaking, cinemas can only get people to turn up and pay up for big franchises like Marvel or nostalgic remakes like Top Gun.
These prestige dramas aren't the same thing as films, of course, they're a different beast -- more collaboratively written and directed, emphasising narrative and character over visual flair, prone to more missteps over a length of 50-60 hours.
It's also notable that although they're tailor made for the binge watching streaming era, there's something slightly counterintuitive about long form narrative which requires you to follow a complex story with a big cast of characters over dozens of hours being so successful in this time of alleged shrinking attention spans.
But here I'm comparing these shows to mainstream films like the Godfather, not to more experimental fare. Not sure if TV is producing anything in that vein? Perhaps the budgets required to do that would make it impossible. (Whereas an experimental film can be shot for relatively cheap I imagine?)