It sure as hell is'nt any more live than a dj set.
Dj = 2/3 channels, mixer and the possibly an fx unit

Pa = Muti channel desk with each device's audio out going into desk enabling mute, solo, eq fx send via the aux, fading assigning. Synths can be played live, samples can be played in at will. Sure patches are usually pre programmed but parameters are not. Patches can be switched in and out at will. Samples can be switched in the middle of the track. Using a midi controller you can tweak parameters on the fx unit at will. You can mix elements of the track out. **** you could even play bits in as I have seen.

I think most have just realised the whole redundancy of it.
Why???