Oh, I haven't researched it much yet. I took a break from racing games after I exhausted the Most Wanted DLC earlier this year. I guess it implies they've done it with NFS and Drive Club as they don't see people walking away mid-race quite so much as they would other gameplay. And with Destiny because of the 'open world RPG' idea they want to go for. So we might not see it cropping up as much in other games.