Boyhood is massively overrated.
According to who? Your opinion or someone else's?
This is also the problem when films, TV shows and popular culture things get a good buzz suddenly it becomes 'overrated'. When people should just say they didn't like it.
Boyhood's lasting effect is the power of time. Is it the best film ever? Nope but most of us would recognise those feelings of growing older and wiser, that's the films biggest draw for me personally. The idea of film on a human level.