Things that not only the fans and media tend to overlook, but apparently the players too. Remember when the Seahawks were going to be good for the next decade? Then they had to pay Russel Wilson and suddenly couldn't afford the legion of Boom anymore?
Its unreal, that people haven't figured this out yet, or at least keep falling for it. Team x (06 Chargers and 13 Seahawks come to mind) has a great draft that happens to include a true franchise QB, in year 2 & 3 of that draft they are either very good and go deep in the playoffs, causing the fans and media to anoint them, but ultimately fall short of a SB victory or the SB all together (Chargers). QB gets paid and then suddenly they are still a playoff caliber team, but not the super bowl caliber team they were thought to be prior to the QB eating 35% of the salary cap. Or like the Hawks they win the SB go back to another one and lose and then the ride is over, becoming just another team that pushes into the playoffs with a shot.
The Chiefs are now at the point where they are probably forced to renegotiate Mahomes. He just finished his 3rd year and I can't imagine he will be playing for his current salary when he takes his first snap of the season in 2020. Which will be interesting to watch, does Mahomes take a team friendly deal to maximize the talent on the roster or does he try to break the bank. From the way he seems to handle himself, I think he tries to middle it. But I can't imagine an argument, other than "hey look at how Brady handled contracts" the Chiefs could make to keep him from being the highest paid QB in the league.
That is my biggest fear about paying Brady so much this year and next (assuming the new CBA won't drastically up the Cap).