This run for the Patriots is different than any other team, especially when compared to other leagues. The issue isn't parity as different teams make deep runs each year. It's just the the Patriots have been THAT great.
A hard cap and free agency are supposed to make it far more difficult to continually be great. The Patriots just happen to have the GOAT coach and GOAT QB.
Again, EVERY division, all EIGHT of them have had a Super Bowl Champion since 2007....
That is parity. Just because there has been a multi time champion doesn't mean there's no parity, especially when the playoffs are one and done.