Joe Montana was pretty much the consensus GOAT 10 (maybe 15) years ago.
And now there's no doubt it's Brady. His legacy, records, and titles are unsurpassed and frankly it's not even close.
But in the next 30 years or so, someone is going to come along and take that title from him, just like he did from Montana. Maybe it's Mahomes (or someone else already in the NFL). Maybe it's Zach Wilson (or Lawrence or Conover or Brock Vandagriff or whoever already in college) or even some kid currently in high school/middle school, but eventually there will be someone