This is what everyone believes. (Not the nonsense that he is already senile and just a puppet. That's obviously false from watching any interview that's more than an edited clip.)I agree Biden isn't the Biden of years ago cognitively and will probably get worse over the next 4 years. I hope he has a strong VP by his side. Maybe Warren or Harris since he's pigeoned himself into having a woman by his side. My personal pick would have been Cuomo as Prez if I was the one pulling the strings but it is what it is and Trumpfart has to go along with his the rest of the Republican stooges.
But he's 77 and he is slowing down and will keep slowing down.
His VP pick is important from that point of view and it is why people are paying more attention than usual.
Will he last 4 years? Could be. If he starts going it will go quickly. If he just stays on a general slow slide he will last the 4.
Of much greater importance in terms of what agenda actually gets passed is holding the House and taking the Senate. That will determine how much of this is placeholder and damage control vs anything helpful getting done.