In the last 15 years (since 2011), there have been 30 spots available to the Super Bowl, 15 AFC representers, and 15 to represent the NFC.
7 teams account for 80% (24 out of 30) of the SB berths:
•Patriots (in their 6th SB since '11)
•Chiefs (5x)
•Seahawks, Eagles, 49ers (3x apiece)
•Rams, Broncos (2x apiece)
This calls into question NFL parity again. The same franchises that are consistently well-run find themselves with repeated trips to the Super Bowl. The 6 teams that made one-off SB runs in the last 15 years?
•Bengals (2021)
•Bucs (2020)
•Falcons (2016)
•Panthers (2015)
•Ravens (2012)
•Giants (2011)
Those 6 franchises all have in common that they are generally poorly managed, except the Ravens.