Ringo's drumming, and Paul's great, snakey bass line. And those distorted horns add just the right touch to one of the album's most under-rated songs!
My theory is, when this album came out, it was so vast, and sprawling, by the time you got to Side Four (Revolution 1, Honey Pie, Savoy Truffle, Cry Baby Cry, Revolution 9, Goodnight), you were overwhelmed and exhausted. These days, you just play a CD and program or go to your favorite tracks, or likewise with MP3 players.
When I first had the album (as many of us here can relate to), it was four sides of vinyl. You pretty much had to manually change the discs, flip them over, and if you wanted to listen to a certain song, you needed to queue it up on the turntable. That could be tedious, so you tended to just play the entire side.
By Side FOUR, after 24 songs already, the senses were somewhat saturated. I know I felt that way in those days.
in years to come/they may discover/what the air we breathe and the life we lead are all about/but it won't be soon enough for me