A powerful argument, and presented with such a courteous demeanor. I wouldn't personally hold a person who claims parallel programming is easy because he managed to add a few ampersands to a shell script as qualified to ratify on other people's level of insight, but I know you think highly of your abilities in that area. Be my guest if that's what floats your boat.
-Color-switching: I know that quite often coders don't want the maximum amount of color switching because they need the cycles for other stuff (...)
-Zoom mode must also at least display one char-column of the bitmap, otherwise making it seamless would be quite taxing.
-$d021 is fixed (since there's no editor that allows for changing $d021 rasterwise anyway!)
As for $d021: No, bad idea, there's no standard bitmap editor around that supports this