when you make an accident, only steel / plastic bends but does not scratch or crumbs only bend, it would be good if you step on glass crumbs will break tires
"Ah shit, here we go again" I honestly don't know how the devs would implement scratch and other related features considering the engine they are working with. Would be mind blowing if they manage to do it one day. As for physical glass shard, i find it unnecessary, as most modern cars have glass that break into tiny pieces for safety purpose.