There’s something happening here
By 
Total early votes recorded by states on Sunday morning 16 days prior to the 2016 election: 5.9 million.
Total early votes recorded by states on Sunday morning 16 days prior to the 2020 election: 27.6 million.
Hopefully one beneficial side effect of the pandemic will be a permanent sea change to the acceptance of the absurd idea that people should have to stand for hours in line on a work day just to be able to vote.