Even then he's still done. He has to bring back ARizona (which is unlikely given they have finished counting the election day votes)
He's more likely to turn Nevada or come back in Michigan than he is to flip AZ.
I don't know what votes have been counted in Nevada and which votes remain to be counted but Biden's lead there is razor thin. This lead in Michigan continues to be razor thin.
How certain are we of a Biden win in either of these states? While Biden did flip to the lead I expected he would build on his lead a bit and come ahead 1 or 2% Right now he's only up a half a percent.
In Nevada last I checked only 8,000 votes separated him and Trump and Nevada only has 67% reporting. Unless we have reason to believe that the majority of the remainder of the votes will be Biden votes, I'm not sure you can count Trump out in Nevada.