I wish him well with his addictions - and a permanent case of laryngitis.
When it comes to his addictions Rush is no different than anyone else.
He's got about a 50/50 chance of staying clean for a year.
He's got about a 1 in 35 chance of staying clean for the rest of his life.
If Rush believes that he is "different" from the garden variety crackhead or gutter drunk - because of his edcuation, personal wealth, celebrity status, or any other reason - those chances get reduced considerably. It really doesn't matter if he went INTO rehab only to try to get out of legal trouble - his attitude when he came OUT of rehab will determine his chances for success today - and today will be all he's got.
As far as that goes, though - the personality he has on the radio may not reflect any of what's really going on with him personally. I once knew a pseudo-"shock jock" who continued to play the "party animal" role on the air long after tylenol and caffinated coffee became his wilder indulgences.