Rock and roll speakers?

^Sure, there's no difference at all between listening to Barber Shop Quartets and Wagner. There's no difference listening to multimiked compressed pop music and Blumlein recorded symphonic music. Solo harp music and solo drum music. There's no point in trying to make better speakers, as all speakers already play everything well.
I think not.:-)

Unsound....no one made the claim you are making. "Now back to our regularly scheduled program". ;?)

And, seemingly, there's no point not worth missing.

Yep size still matters when it comes to full range speaker output capacity, which is the main factor to consider to be able to play all kinds of music. If it can play the big stuff loud and well it can play all the rest. I think that was atmasphere's point that I agree with.

However, technology has evolved to enable somewhat more output from smaller speakers as well since that is what most people want. Although more of the same can only be better. Its all a question of how much you need. After that the rest is mostly what flavor you prefer. Most people prefer vanilla.

I think a critical element is the room, especially size, in which you plan to rock out.

If your speakers overdrive the room, the sound will likely be at best, unpleasant. And at worst, unlistenable.