As I recall, Abe won in '64 because of absentee ballots from the Grand Army of the Republic.

While I would prefer, especially now as a retiree, to vote in-person as I have the time I feel I cast more informed votes when we spend days going over the candidates and issues and maybe only mark a few spots per day.

I also seem to remember, and this would go back to the 50s, that at least in CA the state workers (and maybe others) got a half day off to vote.