I'm made up with this.
Long term stability, creates long-term success imo. All the great managers do 10 + years at a club and that's across most sports too.
I'll also add that there's very few things left for Peet to do. A sign of a great coach is how they rebuild sides and create new stars. If he can do that here, then he'll have done something very, very special. Something as well, that not many SL coaches get to do.