Good point. It has been awhile though, 2007. Full ranges are great for stereo listening, but trickier to use with a Sub. Most people have a hard time integrating subs with full range speakers, especially those with less accurate full range speakers. Both scenarios have tradeoffs - with full ranges with a sub or small speakers with a sub, when to use 80Hz cuttoff, when not to, bass management choices, etc, it's far less complicated for a lot of people to just leave things set as is, and not have to worry about changing settings, or getting all those bass drivers working together properly in the room without cancellations, etc. I use my Magnepans full range only for stereo, otherwise I use my SVS sub for movies. Most people don't want to be bothered with this sort of thing I would think.
My main point is I hope they can get more manufacturers involved! I think if more people have really nice speakers like your Salks, the more happy people there will be!