Class D is going to make high sensitivity speakers obsolete. Amplification is a solved problem and the only thing left is to make it cheaper. The high end audio world has to a decent degree accepted that the Benchmark amp is essentially perfect. Some people want a particular flavor and that's fine, they can buy what they like. For those of us who want a straight wire with gain, class D is there. It's taken decades but there are now a bunch of class D amps that measure about as well as the Benchmark. And some of them are very powerful. The Hypex NCx500 module measures about as well as the Benchmark and is starting to show up in finished designs.
We should reject hard-to-drive speakers more often
Sorry I know this is a bit of a rant, but come on people!!
Too many audiophiles find speakers which are hard to drive and... stick with them!
We need to reject hard-to-drive speakers as being Hi-Fi. Too many of us want our speakers to be as demanding as we are with a glass of wine. "Oh, this speaker sounds great with any amplifier, but this one needs amps that weigh more than my car, so these speakers MUST sound better..."
Speakers which may be discerning of amplifier current delivery are not necessarily any good at all at playing actual music.
That is all.