...and less ability to build a unique, winning program = more incentive to stay.

Again, all the incentives point in the wrong direction from creating a lasting "program" at any school that isn't top 10-ish to start with.

Also, if the best players all want to use Team B as a stepping stone to Team A, they'll be most interested in a "program" that is basically prep school for where they want to go in 1-2 years. They won't want to spend time learning a different system, since that will put them at a disadvantage relative to players who went somewhere that has accepted its role as a feeder for top 10 teams.