In theory virtually all of the gigs I did with my last band could have been done without an amp, as they were almost all going FOH, and all were done with my eq/sound coming from a preamp pedal.That said I’m not a fan of too much in the monitors, other than vocals, I prefer the sound of the instruments behind me, so ampage/cabbage for me. As such both features mentioned would have been useful in the times I used my own amp head.