I honestly believe he can and will. He could fall of a little, sure, but even a Brady at 80-90% of what he once was, is still a top 10 QB in the league. His experience and football IQ will always be #1 in the NFL for as long as he continues to play. Those 2 things will never deteriorate, only improve. So he'd always have those intangible attributes over a potential newcomer, whether it be Garoppolo, Brissett or future draft pick QB.

It's just a matter of arm strength and good genetics to some degree. Brady naturally has the latter (as you might be able to tell from his physical appearance). As for his arm strength, his health & fitness regimen is something I definitely believe in and I can see it helping him greatly. He's got all the money in the world and lives in a time that's more advanced in the medical & health fields than there was in any previous era of football. There's way too many simple minded people who try to point out Peyton Manning (see: neck surgeries, shit genetics) and lack of past players (health care & medical field were terrible compared to now) without the proper context.