i'll admit, there have been times when i could have used more than 4 as well, but damn does it make 2D tables messy, especially with no idea of which compare line is which BIN.
im that bad nowadays that i know which ones are which by the shape of the ignition/fuel curve in the 2D maps. i tend to compare with alot to roughly set the tune then click the button to hide the compare lines or just compare vs a few closer tunes once im in the right ballpark.