We also had a team with a great QB and no D, it got us nowhere.
On another note: I am surprised that people declare the Chiefs Super Bowl contenders for the next 15 years because of Mahomes. Ironically he is on the exact Marino trajectory. Disregarding the year he sat behind Smith Mahomes went to the playoffs in his first playing year (like Marino) and to the Super Bowl in his second playing year (like Marino). And both faced the 49ers in that Super Bowl appearance. The plot thickens.
Marino had a huge advantage in the beginning of his career - no salary cap. If an owner was willing to spend the money they could build a team with money. Not so much anymore. The salary cap is all about parity and outside NE it has worked. Most teams have sat on top for a year or two and then had to restart. Some fell off the grid and some were hanging around .500 for a few years. NE is the only team who has beaten that parity idea and they have done it with good scouting, low salaries and cheating.
Beginning next year this year's KC team has to worry about the salary cap. They have to begin negotiations with Mahomes and Co about extensions. And it will cost them.
Beginning next year the 49ers and the Chiefs face some crazy cap management. The 49ers have 49 players under contract and have 16 Mill left to spend and the Chiefs have 46 players under contract and 21 Mill available under the cap.
I would not expect either team to quickly return to the Superbowl.