These states also have local and state races and the Democrats running for those offices won’t appreciate if their races can’t be declared final. There will be pressure to bring this election to a conclusion no matter what Biden/Harris want
True, doesn’t change the fact that a precinct that has a limited staff and usually handles 5,000 absentee ballots now has to handle 200,000...after working the polls all day.
They won’t. They’ll just call it a night after the polls close and start working on the EV the next day.