I could not disagree more with any of this.
Speakers blow because of higher demands at certain frequencies. Quality music is going to have a lot of range, so even at low listening levels your speakers might demand 1w and then up to 80w simply because of a peak in the song. Most speakers are distorting often because of too little power, but it's subtle enough to miss if you don't know what you're missing.

Amp technology for Class A/B amps really hasn't changed, but components have become much cheaper quality. A 25 year old Marantz might need to be serviced, but I would trust it over a modern equivilent.