Well, true stereo is relevant though for processing as it allows for crosstalk/unique per channel non-linearity, rather than processing the left and right channel with the same "stream" of processing so to speak. In other words, more like real-world analog gear.
i think we are in the wrong thread for that discussion anyway: for crosstalk i am with you. for nonlinearities of channels, isn't it enough to make unique sampling of left and right channels, as we already have in some nebula libraries (different frequency, harmonic and dynamic response)?
system 1: windows 8 32 bit - samplitude prox/x3, tracktion6/7, reaper system 2: mac osx yosemite - reaper(32+64bit), tracktion6/7(32+64bit)
both systems on: macbook pro (late 2009), core 2 duo 3,06 ghz, 4 gb ram, graphic: nvidia geforce 9600M GT 512 MB
I'm implying interactive non-linearities resulting from the relationship and interaction - whatever circuit activity yields for any given piece - of the 2 channels. For the sake of avoiding redundancy, we'll call it all cross-talk.