Just FYI, he's already cemented his legacy. He's an incredibly conservative manager in era of big money. He's rationalized every on-the-pitch stumble with the caveat that he can't spend. Rather, his hallmark is remarkably consistent success within the bounds of fiscal responsibility. Arsenal -- and Arsene -- have based their entire last dozen years' legacy on that narrative.
That's why he won't turn down the money for Sanchez now and risk losing him on a free. And Sanchez and Arsenal are going to get paid the most by City.