In a way, they already have: the 970/7125 combo does this very thing for $700 more than the 1070. Receivers always have to include compromises to fit good amp sections, a robust power supply, and the pre-amp bits and brains into one chassis - the best way to get the kind of power that a receiver like the 1070 offers (65x7 with all channels driven) is to go to two chassis. The alternative, of course, is to look at what Denon does - the 5930 is almost as tall as it is wide (I exaggerate, but it's still huge, even by the standards of a Model 990 owner).