Phew, Tried to avoid this thread, because after Florida was called, and NC and Georgia stopped updating it was clear that this was the kind of thing we were going to see. It would be a matter of how big the mail in advantage was for Biden. And it seems that it's large enough.
I'm fairly confident that Biden will win. Not the kind of win I was hoping for, but relatively in line with how polling predicted. Trump did indeed outperform in the rust belt again (by how much depends on the final margins) but I've pointed out a bunch of times that it would take a larger error than 2016 for Trump to have a chance.
Nevada is done. Mail in vote has heavily skewed towards Biden, and mail is all that's left, mainly in the most heavily democratic county there.
Arizona seems safe. A five point lead there is big, considering where the remaining votes are. I'm not sure if they're mail in or in person vote, but I don't know if it matters. Trump did indeed dominate the day of voting, but not to the extent Biden did in mail in. I just don't see 100K votes.
It seems like Wisconsin is still doing mail in, and Biden's lead has been growing. It's unlikely the last 3% or so of the vote will change things. Michigan has mostly mail in left in deep blue areas. Particularly Detroit. As I type this Biden has taken the lead.
North Carolina is still a possibility. Not a strong one, but not impossible. Should finish within 1%. Georgia's remaining vote is mainly absentee in, and the margin there favors Biden. Enough to make up 100Kish votes? I dunno, but it will be within 1% as well. Very nice numbers for Democrats in those states, which help soften the blow of what happened in Florida.
Pennsylvania is iffy. I don't have enough sleep to do the math. But it's still quite possible, especially because they can keep accepting ballots for a few days if they were postmarked before the election.
It's looking good. Not as good as I predicted or wanted, but a win is a win.