And even though we'll never know, it would be interesting how Bernie/Warren would have stuck out this general. Biden does have an edge in that he's more moderate which probably does appeal to the disgruntled Republican/Independent voter who may simply be over Trumpism.
Even though I think Warren would have been a better choice, Biden was the safer choice. And the #1 goal should be exiting him - as far as 2024 goes, we'll see who spins out of the primary. I still think Biden is only going to serve one term, but it wouldn't be unheard of to go further. Dianne Feinstein and Chuck Grassley are both 87 now as was RBG so it's possible that if healthy, Biden will seek a second term.
That will be really interesting is the R side of the house. Will Pence try something out? I think he'd be swallowed up if Donny Jr. tries to give it a go or anyone from Trumpland. Nikki Haley or Ivanka could be a female face and you have a long line of people like Tom Cotton/Ted Cruz-types that will make a run.