Biden is not going to need a VP candidate. Period.
May you be right my prayers answered that way, too.
If he doesn't resign as a candidate before the convention (a possibility) then he may be watching TV election night and say "I don't care. I will not concede to George W. Trump until I see Walter Cronkite say I don't have a path left to the electoral college win. I'm not a quitter. What station gets his coverage?"