Plenty of other formats since then, too. The last one that got me was SACD. Great sound (both 2 channel and more), and still listen to some often, but don't know what I'll do when my SACD player craps out.
I still use separate amps for front and rear in my system. Actually the left/right fronts are bi-amped. Fortunately my obsession with such things has waned over the past few years. You think this hobby is expensive? That one can get pretty sick, pretty quickly.
Long for the days when my rig looked like the one
@CarolKing posted above, and my ears didn't know any better!