I would say AeroFS is as easy as it gets when it comes to transferring large-size files between computers on the Internet. I use AeroFS to share photos and videos with my parents across the Pacific. Works pretty well.
To save you time, you can skip the initial rant about how closures are not taught in universities and start reading from the heading "A Concept Explained Simply".
By crippling 3rd party software, Apple is hurting its platform the way Microsoft is hurting itself. Whether or not the hurting is intentional is beside the point.