Those of us who were up late watching the returns that night remember what happened. Especially people like me who had been watching election returns for over 40 years (at that time).
At some time after 11pm ET, four states (WI, PA, GA, and AZ) simply stopped adding to vote totals across the board. They simply froze in place and to my recollection, no one on any of the broadcasts took serious note of it. At 1am, Trump was still comfortably ahead. And then overnight, the vote dump happened.
No one will ever convince me that the fix wasn't in, or that this was a normal pattern. I have yet to see anyone in the media examine that pattern and question how it could occur. The excuses that I have heard were all oddly unverifiable. Of course, all of those counties were Democrat strongholds and all of them had "record" turnouts by morning, with nearly all the new votes going to Biden.
It's water under the bridge now, I know. But don't anyone tell me what I saw happening with my own eyes was just a fluke or a mirage, because it can happen again if we let Democrats get away with ballot stuffing, counting dead voters and people registered at vacant lot addresses, voters sending in ballots from multiple states, and more.