with all die respect to good subs, they do play lower than the old thunderlizards.
For the LFE in movies this may be an issue but, for music, the big old dinosaurs did just fine.
It's a matter of course that the design intent of home entertainment systems has shifted from music to home theatre and this required a paradigm shift in design goals. A lot of young 'uns never really had the opportunity to hear a good "old school" system strut it's stuff with music, and most likely won't.
but, lemmetellya, if they are anything like my step-sons and their friends, let 'em hear a good "old school" system on music and they will never look at MC systems quite the same way again. My old Marantz 2270 and 10" JBL L-26's* playing classic rock converted all of em!
* And these aren't even that big!