Here's a scenario: Let's say the Republicans follow through with trying to organize republican state legislatures to appoint their own electors -as the constitution allows. Biden win by a comfortable electoral college margin, but still narrowly loses Florida. Well, Florida's new legislators are sworn in immediately when they are elected. So one option would be that if Republicans really want to steal the election when they lose, Democrats -after winning enough state legislatures, will have to counter that balance by appointing their own electors as well.
Suffice to say, the goal now must also be to win as many state legislatures in states where they are sworn in immediately or shortly after election. This way, we can also prevent the sort of ratfuckery that Trump and the GOP are openly discussing now.
https://ballotpedia.org/When_state_legislators_assume_office_after_a_general_election
States where legislators assume office the year of their election
Legislature (H/S) When sworn in
Alabama State Legislature
(H, S)
Alabama legislators assume office the day following their election.[47]
California State Legislature
(A, S)
California legislators assume office the first Monday in the December following their election.[48]
Florida State Legislature
(H, S)
Florida legislators assume office on the day they are elected in the general election.[49]
Hawaii State Legislature
(H, S)
Hawaii legislators begin their terms on the day that they are elected in the general election.[50]
Idaho State Legislature
(H, S)
Idaho legislators are sworn in on the first day in December following the general election.[51]
Indiana State Legislature
(H, S)
Indiana legislators assume office the day after their general election.[52]
Maine State Legislature
(H, S)
Maine legislators assume office on the first Wednesday of December following the general election.[53]
New Hampshire State Legislature
(H, S)
New Hampshire legislators assume office on the first Wednesday in December in even-numbered years, one month and one day after the November elections.[54]
North Dakota State Legislature
(H, S)
North Dakota legislators assume office December 1st.[55]
Oklahoma State Legislature
(H, S)
Oklahoma legislators assume office on the state's statehood day on November 16.[56]
South Carolina State Legislature
(H, S)
South Carolina legislators assume office the Monday after the election.[57]
Tennessee State Legislature
(H, S)
Tennessee legislators assume office on the day of their election. However, the governor and state officers are not sworn in until January 15 following the election, and the legislature is not organized for session until January.[58]
West Virginia State Legislature
(H, S)
West Virginia legislators assume office on the first day of December following their election.[59