He's too well off and comfortable with life at Bayern, taking away the Guardiola issue aside, to move abroad, and be the dependent player for Juve or any other team in Europe. The key here is his motivational level and what he wants to do next. Sure, he's flattered by Juve, who wouldn't be? but to actually pack his bags and leave his beloved country is something else. Unless Bayern transfer list him, which is very unlikely, this deal is very difficult to materialize.