But the electors are themselves elected. So any votes for the electors pledged to Biden prior to his replacement must be discarded. While NY,Cal, Ill, Ma would not matter, Mi, Fl, Wi, Mn, Az, Va, Pa most certainly would.
Are you arguing the Electors become disqualified? That may be true with a certain state but it is difficult to believe a state would hamstring itself in such as fashion given a last minute replacement.
Which goes to my point, if Biden is replaced one way or the other prior to the election, or even shortly thereafter, given the impossibility of performance those Electors are relieved of that pledge.
We may continue to disagree, but you can have the last word.