Cheeseburgers don’t kill, and at Trump’s age his chances of lasting another four years are well under 100%. There is a very high correlation between being over 80 and dying. Also note that Vance was really Trump’s chosen one, whereas Harris was more or less forced on Biden to balance the ticket (she was the least toxic “Progressive” available). So don’t be shocked if Trump retires sometime after Jan. 20, 2027.
Also note that Vance is more polite and better educated than Trump, and will appeal to both the MAGA base and the Republican Conservatives.