So something like 90% of modern metal has two guitarists that playing in unison. This is great for the studio as panning one left and one right has the effect of double tracking. But what about live? Whats the point? Its going to be mono and havign two guitars might make a thicker sound but I would say that since they are in mono it would rather loosen/muddy up the guitars. Could the majority of bands get away with one guitarist? Am I missing a hidden advantage for having two guitars live when they both play the same thing?