I had the same theory as Bluebull a while ago, but I think others are right on the chasing 7 wins before he moves on.
Someone who has the drive, determination and be that insanely competitive that they can win Dakar several times would find it a tad difficult to walk away when they are so close to equaling the record, in my unqualified opinion...
"Far to the general now, and without great final hope of victory, he has nothing to lose. And it must above all have rabies. For the moment, it dominates this special."