First, I read your excellent debate-related piece the other day. It seems to have been boosted. Congrats.
Whatever Biden decides to do, even if he decides to stay the course, how can someone call him selfish without knowing what's in his heart? Perhaps he would make that decision out of purely feeling the debate was a misstep and he's still the person for the job and to defeat Trump?
A couple of days ago, I posted an open letter to Biden suggesting that if he does feel that way, he can take the courageous step of releasing his delegates while keeping his hat in the ring--go to an open and fair convention and convince the party and independent and undecided voters. https://marcus17043.medium.com/an-outside-the-box-suggestion-for-biden-6c336f4a9908