If the assumption is that alnicos sound better is this based on the fact that during high/low temperature periods the mags loose strength but the strength is returned to spec. when the temperature returns to normal?

I'm not sure about the permanent loss of power on alnicos. Is this related to high power situations that are strong enough to blow the voice coils?

If the power needed to blow a VC is much lower in a compression driver than a woofer, for example, does this mean that it is unlikely that a compression driver would experience enough power surge to damage/reduce the alnico motor strength?

What other conditions destroy motor strength - dropping the driver or placing two driver motors back-to-back? I read on the Net that back-to-back placement can cause magnets to loose strength.

Thx..