[cedws]

The only potential benefit I can think of is getting results faster, but it's really not important enough to optimise for.

Maybe a dual system of paper ballots and e-voting could be good so that they cross check each other. Can't stuff paper ballots without manipulating the digital counter, can't manipulate the digital counter without stuffing ballots. A digital counter also enables meta analysis which could identify suspicious patterns, like a wave of votes for a particular candidate.

[CorrectHorseBat]

Another possible benefit I've heard of is it can stop some kinds of voter intimidation:

Someone gets hand of an empty ballot, they fill in the ballot and give it to you and tell you to come back with another empty ballot. Rinse and repeat. Of course, with today's smartphones there are simpler ways to do this. Also moot if you can vote by mail, which is why voting by mail is a really bad idea.

[riffraff]

there's a much simpler solution for in person voting, used in Italy for example: you have a numbered sticker on the ballot, when you get the ballot the sticker id is written down, when you get out of the voting booth it gets verified and detached.

The ballot you throw in the box does not have the sticker (vote is anonymous) and you cannot come in with a pre-marked ballot (and being out one) cause the number would not match.

[lobf]

Sorry I do not understand how this would work. Can you explain in more detail?