Hi Bachus
Actually technics sort of did it back in the early 90's. Can't remember which model they brought it out on, but it was fairly early I think
You could literally dial up a style.
You just scrolled thru style elements till you found one that worked and put together a style part. I think it only worked for variations.
Rather good in it's day.

As for the sd7, certainly looks simple enough, do you know if it also works for the other style parts like fills, intro's/endings?