are advantages or played a part in Alabama's success? No one's attributing all of Alabama's success to these things, that's a strawman dodge.
Given that Saban's pursuing them and still adding to these advantages, it's clear he values them.
So the answer isn't "all of the above have zero impact."
If the answer isn't zero and it isn't, what is the impact? That's the question ND has to answer.
Saban didn't add three extra analysts because he thought it was trivial. To completely discount them is non-sensical.
Kelly can certainly win a National Championship, Saban won't win them all, but Kelly cannot, IMO, put together a 3 of 4 year run like Saban's doing even if he coached at Saban's level. Kelly didn't and won't have the opportunity to plug in Terrance Cody in year 3 or Jesse Williams in year 5. Those two players played a critical part in Alabama's defense in all 3 title runs. Their impact wasn't zero.
Saban's built very strong program and is pressing his advantage.