I think Mahomes deserves all-time great status, even if he falls off a cliff. When someone is as indisputably "the man" as he was the year he went MVP and SBMVP, as well as a top player in the league 4 years in a row, that's enough for me. Greatness is not just a measure of longevity, but can also be something to a fixed time and place. I get the annoyance that we have with cannonizing new "best ever's", generally speaking. But to say that Mahomes isn't one of the greatest of all time is to say that Hendrix or Cobain aren't, and just get credited for it because they died. IMO, Mahomes has been "the Man" long enough. Whether he's an all-time great is not really a discussion anymore, we're just figuring out where he ranks in all-time greatness now, understanding that at least 2 all-time great QBs are active in the league currently, and may rank out way ahead of him when all's said and done (Brady and Rodgers).