Important Question 
If a new narrow phase collision system allowed geometry to be created and altered in real time (not currently possible) would being limited to convex polygons be an issue?
The reason we (the developers) are asking this question is to find out how important it will be to include polygon decomposition code (convert concave polygon into several convex polygons) into our new narrow phase.
The new narrow phase should allow for nearly instant creation of any size geometry and hopefully a special fracture function to allow geometry to selfdestruct in a fairly realistic way (at least for 2D).
