Not all amps are created equal, and not all watts are created equal. I’ve gone the gamut from a 55wpc Technics SA500 receiver to a 70wpc Yamaha A500 integrated amp to as high as 255 wpc in a Hafler DH500, down to 150wpc in a NYAL Moscode 300 hybrid, to a Distech LS-2 (modded BKST-140) @ 100wpc, all the way down to about 12 watts per channel from KT66 tubes in triode. Every amp on that list sounded progressively better to me....playing louder did not. All my speakers have been average efficiency, and the amps I’ve liked the sound of best are my current 12wpc monoblocks.
I know it’s subjective, but I suspect that synergy and paying attention to the whole system chain is a more critical consideration than just amp power.