A team that wins it all just once gets that forever boost going forward. KC just has that confidence that most teams don't possess because of this. This is what kills me about the Bills never getting over the hump in the 90s. Had they won the first SB, all of the others are different. The Chiefs elevated themselves and now never doubt themselves. By contrast, every team facing Mahomes in the last 2 minutes, just tightens up and this just increases the chances of a bone headed error like yesterday.