I guess stereo would make a big difference to those who wanted their full acc canned backgrounds to sound more realistic, and add to their appeal as "one-man-bands". For those who use mostly kb alone, or w/drum track, or with bass/drum tracks, or play duo/trio gigs without using full acc backgrounds, stereo may be a marginally nice effect, but would hardly make a significant difference in the quality of the performance and the enjoyment of the audience.

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Miami Mo