>>Slowing it down ought to be doable, but I’m pessimistic about the possibility of halting it. Aging is (IMO) just another name for an increase in entropy; hence, trying to halt it is tantamount to stopping entropy in its tracks. Good luck with that!<<
The 2nd law of thermodynamics does not imply the necessity of aging because living organisms aren't isolated systems.
This is the same mistake the creationists make when attempting to argue that evolution violates the 2nd law of thermodynamics (with the claim that evolution predicts movement toward more organized systems).