There are still franchise players in the NFL, and players in the MLB bounce around to new teams all the time. What's so great about a dynasty? How is that good for the league? Odd how all of the people talking about how dynasties are so great are Yankees fans. Having the same damn team win a majority of the time is boring. The fans in the one market enjoy it, but all of the other teams who never have a chance, their fans just stop caring.