FWIW, using a switched output can be useful if you have something which is low powered which should be always be on when the AVR or pre/pro is on and off when it is off but does not have a control signal input.
It is not good for an amp, which needs to be able to draw a lot of power.
It is good for something like an equalizer which is in between a pre/pro or AVR and an external amp. (That's what I used the switched output on my previous pre/pro for. Of course, equalizers are anathema to the true Audioholic! )