Boyhood
I can't believe it took me so long to get around to actually watching this and that I've never really taken the time to think about what an insane concept of a film this is.
How do you even write something like this? What do you do if something fucks it up like a decade into shooting it? How on earth do you make it flow so perfectly with such consistent chemistry and visual identity? You could put the beginning scene next to the end scene and not tell there's over a decade between them.
Just a genuinely incredible achievement.