I think you’ve got it backwards. I know I, for one, am scared that he will be replaced by someone who is, or at least is perceived to be, more competent and appealing. Right now we’ve got the closest thing we can get to Hilary 2.0 without HC actually being the nominee again.
Well relax then. If Biden's breathing then he's the candidate. The Democrats know that the alternatives, Warren and Sanders, are even worse.