OK, then I have some sort if AI clone who roughly acts like I'd do. What does that have to do with lifespan extension and (if I'm not a delusional tech billiona

OK, then I have some sort if AI clone who roughly acts like I'd do. What does that have to do with lifespan extension and (if I'm not a delusional tech billionaire) why would I want that? Actually, how would that sort of "immortality" even be fundamentally different from the traditional way of becoming "immortal" - by having your children or contemporaries carry on your estate in your name, according to their interpretation of "what you would have wanted"?