Yes fixing bugs first is sensible, but you still need to prioritise projects as well. My point is that there is no need to lose the benefits of separate boards

Yes fixing bugs first is sensible, but you still need to prioritise projects as well. My point is that there is no need to lose the benefits of separate boards in order to solve the (non-)issue of quickly finding out what to do next. And if you have a single board then try easily seeing how product x is going... (btw, by colour-coding I meant features, bugs, etc. so you can immediately see what's what)