I cant find anything to disagree with in your post up there. It's totally silliness to make any unqualified statement about a particular devices currently delivery ability since so many other factors contribute to it.
I agree with your assessment of feedback too. My F5 is a class A amp that utilizes "generous" amounts of negative current feedback and I've never heard anybody say that amp sounds bad for it. Feedback is something that needs to be applied with careful consideration and shouldn't be as universally disparaged as it is.
The reason you see BJT amps with fans and thermal tracking schemes has to do with the characteristics of BJTs. They're highly prone to thermal runaway where as the device heats up, it conducts more current, which in turn raises their temperature, which causes them to conduct even more current. This characteristic does produce distortion which also requires compensation. MOSFETs, when strapped to a big enough heat sink, need no thermal tracking because their conductivity vs temperature will reach an equilibrium at some point so long as the bias is within the operating range of the device. Some MOSFETs, like laterals, have virtually no thermal drift and you can set bias on stone cold devices to find the bias only creep up slightly as the thing hits 75°C.
It all depends on what the designer is trying to achieve as for what gain devices he chooses. Pass certainly uses plenty of BJTs in his older designs, but he uses MOSFETs these days for the exact reasons you described. Simpler circuits and a more organic, tube-like sound.