Is there rampage Mode available without respawning Cars in DiRT Showdown?

I just played the demo version of DiRT Showdown on my PC and played the rampage mode in it. While playing I noticed that the cars which were destroyed would disappear and then again respawn in few seconds. I think that this spoils the mood of playing rampage. I mean, when a car is destroyed, it should remain broken at the same place. What do you other people think of this?

The graphics of DiRT Showdown are so detailed and that of high quality, adding the destroyed cars to the map will make it more heavy. To show debris of broken car will need high number of polygons and high quality of texture. Not every person playing DiRT Showdown will have computer high enough to support such heavy details. To avoid system from crashing or malfunctioning, developers have made the broken cars to disappear instead of forming debris.