No.
I've had friends bring over amps costing much more than my bottom of the line Krell, and theirs just couldn't produce fatigue-free sound. And I've tried other amps costing much less than my Krell, and there was one in particular that was almost as good and only cost $1400 for the pair of mono amps, so, about 1/5 of what mine cost ten years ago.
Now, with that said, there is something that can make amps happier with low impedance speakers, AntiCables ZERO Autoformers. I got a pair for my tube amps and got much better high frequency response, but at the expense of lower output overall. Everything comes with a cost. But, I tried the ZEROs with my Krell amp and it was happier as well! It didn't need any help with high frequency response, but now the amp sounds sweeter, even with the increased high freq output. One way to try to explain it is with chimes, which now sound more real, "rounder" sounding, smoother. So far, the only negative thing I can say about the ZEROs is that when using the 2x taps the output is reduced by almost -3dB, but only below about 7000Hz, above 7kHz the output level is slightly increased. So, with my tube amps this makes the frequency curve pretty flat up to about 13000Hz, but with the Krell the frequencies above 7kHz actually rise a bit and even with that rise it sound sweeter, go figure.
My tube amps and Krell amp all run cooler when the ZEROs are connected.