The biggest downside with Supercars is the incredibly terrible officiating. Seriously, a 5 second penalty for shoving the leader out of the way and passing? That's not a deterrent at all, every driver in the field would take that deal in a heartbeat. At the absolute minimum it should have been swapping places + 5 seconds, and even that would be lenient...
Well, it's even very rare that drivers get 5 second time penalties in the Supercars. They don't hand it out often.
The bump and run has been used before and drivers have got away with it so the SVG incident was a strange one. It kind of came out of nowhere because we are so used to seeing bumping and people getting away with it. He did deserve the penalty and for me, the 5 seconds was fine.
In F1, 5 second penalties are useless because the field is spread apart but in the Supercars, 5 seconds is a lot of time. If It weren't for some mad driving at the end, he wouldn't have won.