IMO the reason is pretty simple. The amount of quality players on the top teams is deep. That’s why you see many coaches taking advantage of their wealth by constantly subbing their players.It’s funny how we won all those championships with a short roster. Were those teams that much better conditioned? I don’t think it’s exhaustion and, if it was, we should be wondering why! Why are these kids unable to do what many other teams (not just UConn, see Missouri) did? I think it’s more mental than physical.
The difference between the UCONN teams of yesterday vs today is not the issue. It’s the difference between the top competition of yesterday vs today. Geno won his NCs the day his talent signed their Letter of Intents. Back then, they were so superior, that it didn’t matter much what he did. He out recruited everyone else when the the talent pool was much thinner.
Now, we are in a new era. Scholarships have increased. Great players and deep benches everywhere. But what hasn’t changed is the coach’s philosophy. He hasn’t adjusted to the new paradigm. Parity means that the team who wins the 4th quarter, wins the game. The coaches who used their bench liberally for the first 3 quarters will see their teams move up to another gear in the 4th. The coaches who kept their starters in without much rest will see their teams a step slower.
What worked in the past was due to superiority of talent. Those days are gone. Change or fail.