Been thinking, and the abnormally high voter tunrout might be the result of political operatives on the ground having way too much faith in the polls. They thought Biden was heading towards a landslide. If Biden is supposed to be getting three votes for every vote for Trump it doesn't matter that they add some more on top of that. But Trump wasn't trailing Biden, in fact he was heading towards a historic voter turnout surpassing any before that in US history. So votes start rolling in, and oh shit, the map is painted red all across, states left and right are being called for Trump, Florida is just a speedbump.
Now they're fucked. They've already added votes on top of Biden's results, and now Trump has gotten a massive turnout. The votes are already well on their way to break previous election records, but they got to add more to outdo Trump. So at 3am they freeze the count in the remaining states, try to get a clearer picture of the way things are headed, and an hour later know about what they need to add to just about tip ahead Trump.
Result is they have to add a 100k votes while most of the nations is asleep. With more coming later in case it becomes necessary. Problem of course being they've gone from breaking previous voter turnout records to leaving them in the dust, absolutely annihilating it. And now someone has to explain how districts ended up with 200% turnout.