Sorry if this is a lame question, but why are some 2 channel amps, not channel switchers? By that, I mean, why don't these amps come with a footswitch for the channels? I'm thinking of the 65 London, the Hayseed, etc. It seems you need to by a Framptone, a Switchazel, Switchbone, etc in order to use either or/both channels of these type amps. Why do the makers not include a footswitch if they make a 2 channel amp?