Technically, we're not voting for the candidate -- we're voting for a slate of Electors who will vote for the candidate when the Electoral College meets. The candidate's name is there only as a proxy for the Electors.
This means that Biden can drop out and be replaced by someone else, and any ballots cast in his name can still be counted for the slate of Democrat Electors. Those Electors will then vote for whomever they want within state Electoral College pledge requirements.
-PJ
At least in the primaries, when Pete Buwhatshisname and Pocahontes dropped out after some early voting people were not allowed to revoted if they’d voted early.
The electors are for a ticket. If the ticket changes then the votes are different. If it ceases to be a Biden/Harris and becomes, Harris/Whoever I would think they need a different set of electors.
That works if he drops out AFTER the election. If he drops out before the election, there is no way people are going to go vote for him and Trump wins an EC landslide. It’s too late. Joe cannot drop out, and the media will make sure the the story is treated just like the title of this thread suggests. They will call it a fabrication, fake, a Russian disinformation operation, desperation, debunked, etc.