benefits..well...

I can go from a strat to a sitar or a banjo or change my tuning (in theory anyway) with the flip of a switch.

I have about 30 vintage classic guitars at my fingertips..which I can customize with out effecting there value.

I can swap from an arch-top to a vintage LP or Tele live with out so much as opening a guitar case and if one is in tune they all are !!

And then there is the sound of the axes them selves !