Still has a hidden card or two? Sounds pretty absurd to me. Honestly -- and I don't want to sound like a dick, so I really do apologize -- but this comment sounds like a deluded sports fan in denial that their team is not going to make it out of the playoffs.
I don't think the ship sailed if so many top Democrats and donors called for him to step aside. Evidently they didn't think the ship had sailed yet, so I'm apt to believe them more than a superfan.
But right now, it's looking like the snowball did not gain enough momentum to become an avalanche, and Biden will still be the candidate in all likelihood.
There was effectively no primary -- no legitimate other candidate was on the ballot in my state -- because they fed us the impression that Biden was totally fine cognitively.
And then the debate happened. There was no realistic way anybody but Joe Biden came out of this primary, and I think that in itself is pretty anti-democratic.
Not that any of it matters in the end, because Biden is not going to step aside and I don't think Democrats have the power to push him to the side.