A popular (well, used to be) artist who does this is Chris Carrabba (Dashboard Confessional, huge in the early '00s, was basically a solo act when he started, b

A popular (well, used to be) artist who does this is Chris Carrabba (Dashboard Confessional, huge in the early '00s, was basically a solo act when he started, break-out and biggest hit was "Screaming Infidelities" which got a ton of radio play). I think he did it to make it easier to play+sing his songs solo, is all I can figure. Heavy use of multiple open tunings. He'll use like half a dozen tunings on one album, plays on stage with a rack of guitars so he can swap between songs.