At this point, now that the "Cheap Fake" gaslight has been exposed for the flat lie it was, every single time he has a Dementia Joe© moment the press will be all over it like stink on dookey pops. (holy sh*t snacks!) and we will be entertained.
IMHO Dems should believe that Joe needs to step down because they have got to know that he will not make it that long without showing us that he regularly cannot function at even the lowest levels of competence. It will not go well for them when it happens.