I generally believe most movies should be shorter and that there’s a lot of room for addition by subtraction. That said, if a movie earns its runtime then I don’t think there’s an upper limit to how long it can be. Lawrence of Arabia is 3 hours and 45 minutes and it’s incredible, I don’t think I’d cut anything in it besides the long black intro screen which is a relic of its time. I would say justifying that run time gets exponentially harder past a certain point.

With Way of Water sitting at 3 hours and 12 minutes I do think Avatar 3 needs an intermission if it’s going to be longer. Asking people to sit and be fully engaged for 3 and a half hours is a big ask and having a chance to go to the bathroom, get snacks, stretch your legs, etc is needed for something that massive

More accurately the waterfall mission ends up on Phobos only to have to scramble to figure out how to land on Titan because the customer can’t tell the difference between moons

How would you federate something ephemeral? I’ll admit I don’t understand the specific techinals of federation but what stops another platform from hosting your content locally after it has supposed to have been deleted? It seems like the two goals of the platforms are diametrically opposed