his responses were substantive, he had a clear command of the facts, and he appeared perfectly lucid. did he commit the occassional flub and ramble at times? yes, but that isn’t what’s been at the heart of the speculative hysteria over his seeming senility.
if this press conference doesn’t allay any concerns you might have had about biden being in possession of his faculties, you were never acting in good faith.
will this move the needle to his benefit? not necessarily, but it won’t hurt hum, either. if he continues appearing like this, though, his chances against trump will only improve.