To borrow cadence from the current US President-elect: Joe Biden is absolutely not going to run for President. You know it. I know it. Everybody knows it.
It is not going to happen. Not even a little bit. There is not a chance in hell the 78-year-old Biden will contest the 2020 Democratic nomination, win it, contest the US election, win it, and then serve at least one term as US President, making him 82 at the bare minimum by the time he leaves office.
Nope. Nuh uh. Not gonna happen.
But sweet damn it’s nice to dream, if for no reason other than picturing a future where Biden and Barack Obama‘s adorable friendship fills the public sphere for a few more years.
Biden, for his part, is certainly enjoying the shit out of remaining entirely non-committal on the subject, with that whole “who knows what will happen?” line getting him a hell of a lot of mileage.