Agreed. Nothing is certain, but those saying it's a certainty that Levitre's gone are ignoring the current regime's track record of not losing anyone they've made an effort to keep/acquire.
Moreover, IMO, the elevation of Brandon to President makes it even more likely the front office will find a way to work out a contract with Andy. If Russ wants the Bills to be relevant again, this is one of the ways he can demonstrate it--by keeping one of their most valuable home grown players in the fold.