We can't expect more than a 3 year stay. If it was to happen then great, but we have to assume he's here for 3 years & thus get the club running to his model & get the most out of him whilst he's here, learn from him & make sure we understand it all & how to pass it on, so Vieira or whoever can carry it on when he goes.
If he decides he fancies carrying on, then fine, but his m.o is 3 years at high intensity, then gone. Barca have built on it, Bayern will ignore it.
I think it's important he doesn't manage like he's only gonna be here three years though.
4 years for Barca of course, but he did it like it was the only job he'd ever take, and IMO the foundations he laid there to effect the club top to bottom existed because he didn't have a set departure date.
Bayern were constantly looking over their shoulder to the point when he would leave and becaus of that his effect was limited Away from the first XI