Brady had about a 10 year gap before he won his 4th ring with the Patriots.
I'm not saying that the Chiefs are going to fall off but this year team is out of sync and I can't see them going far in the playoffs. They are getting older, complacent and have some weakness in key areas. Plus they are going to get everyone big shot each game because they been the big dog in the league for years. That takes a toll on you over time, especially as you aged. KC needs to make some tough moves this offseason if they want to stay on top.