Wow... none of you guys seem to have gotten what the awesomeness of blending-amp tones is ...
It´s NOT ABOUT STEREO WIDTH (!), but about BLENDING TONES and being able to PAN THEM.
I do NOT like delays and double trackers, but using my JVM410 on one side and my PRS MT15 on the other, profiled with different cabs DOES MAKE AWESOME SOUND, with some sort of "stereosation", but not for "timing" but for difference in signal-chain...
You can still go perfectly NARROW MONO and still blend two amps, WHICH SOUNDS AWESOME ...
THAT is the reason why Quadcortex or other units offer stereo paths or even quad-paths.
Question to all of you:
NEVER TRIED THAT ??
I do that in my mixes all the time,
Because it sounds killer and you can create unique soiund textures outside the usual amp-sound-framework.