I think it all depends on how your total system is configured. My 3 way active Linkwitz stereo speaker setup require 8 channels of amplification that include 4 channels for the dipole bass sections. An Adcom GFA-555 drive two passive subwoofers for my HT setup that also use the Linkwitz stereo speakers. My Denon AVR drives 4 channels of surround sound in the HT setup. There are 3 channels of unused amplification in the Denon. So, I do have multiple amplifiers in my system, but a lot of my available amplifier channels are in use one way or the other,
However, I do have 10 channels of 60 watt amplification sitting around in the form of 2 Adcom GFA-2535 amps and 1 GFA 535 amp. Sigh, I would sell them, but one never knows what use I may dream up for them, and they realistically would not bring much if resold. Barring a exorbitant offer, I would rather just keep them as they don't take up that much spce.