As opposed to dying in 1519, let's have Maximilian I live until he's 75, so 1534.
How does this affect the Reformation? The italian wars? The Empire? Ottoman invasion of Hungary? Also assuming Ferdinand and Anne inherit Bohemia & Hungary still, how does this affect things as well? Spain? The Low countries? Will Maximilian marry once again? Whom do you think he'd marry? Wurttemberg ?(basically Maximilian was found of the family and so the Duke took advantage of that to expand so when Maximilian died OTL and he continued taking stuff he wasn't supposed to a the Swabian league attack and deposed him, then sold wurttemberg to Charles V)