@Frank Apisa,
I can't tell you how incredibly refreshing and politically invigorating it would be if a politician, ignoring the promptings of ego and personal pride, chose to step aside for the benefit of his party and ultimately the country. The only example I can think of is Willie Brandt's dignified resignation when a close aide was revealed to have been a spy.
The dilemma is that if the party base begins to say no to Biden and he resists, challengers will begin to campaign against him, which could make Biden look weak. And it would diminish the genuine appreciation we feel for how he defeated Trump how he's done his job. I'm just hoping he sees the light – somehow – and acts like a true statesman.