I figure this is mainly due to the internet giving artists more freedom to craft songs they want since labels have lost the strangle hold they had over artists, but can someone point out to me exactly who and when the trend from the standard three verses with hooks/choruses between each verse got changed to artists only doling out two verses, and hell sometimes only one verse?

To be clear, I am strictly referring to rap artists.

"Sean sparks like John Starks, nah, Sean ball like John Wall" - Rest In Power Forever Sean Price.