In general, I think with the advent of the three point shot and the amount of time that is spent on practicing it has changed the game away from the interior post offense. But because such emphasis is spent on this in the younger, basketball learning and teaching ages of development, so much less time is spent by kids and teenagers developing the ability to score in the post making those that have the type of interior offense to make a difference rarer to find.
Is there any doubt that a Shaq or Kareem or Moses or Karl Malone wouldn't eat up this league and score as easily as they once did? The emphasis on the teaching levels were once to develop the bigs first and work backwards. Now its develop the PG first and work forward, hence the proliferation of excellent guards and bigs who's skills are not good enough to make a major difference nowadays.
Heck, teams sometimes seem they would prefer their bigs as tough inside defenders but exterior long shooters than to have a player like Shaq or Duncan. BTW, which teams have been the most successful since MJ left the game? Shaq's and Duncan's.