85 million? There are only 323.1 million people living in the United States. That's a huge chunk of people that couldn't vote.
Couldn't get to the polls covers a lot of reasons. They are shut-ins, they couldn't get time off from work, they are convicted felons living in prison, they are living overseas, they are soldiers on active duty, etc.
How many people are over 80, and don't know a thing about computers?
Blockchain voting? This would be so neat. The dead couldn't vote, illegals couldn't vote, politicians couldn't interfere. People couldn't cheat. You'd have to have sign on credentials.