Agree. I play Uptown with a five and most of the rest with a four or a four with a synth (lower than E notes) like some of the Lady Gaga or more recent songs. Uptown just doesn't sound the same with a four; you gotta cover octaves with pops in that song while still playing the low notes, some near the nut others up near the 12th fret and transitioning really fast up and down the neck.This is why I play 4’s and 5’s. While I generally agree with @chris_b I sometimes feel that some songs, such as Uptown Funk, just sound better on a 5-string. Really there is a long list where that is true however for the most part I can make most songs work on either type of bass. It just depends on how true to recording I need to be for a particular gig.