I think that electronic voting as the single source of truth is a bad idea, but electronic voting as a method of making the process more efficient is not a bad idea.

Voting machines should print off a receipt of your vote, which you can then confirm and seal in an envelope, like you would a paper vote, and put in a box of paper votes. The machines will also need to have a method for voters to correct an incorrect vote somehow.

If there are irregularities, or a recount is needed, the paper votes can be counted. There should also be an option for a normal paper vote, if the voter so choses, like how in an airport you can choose an Xray or a pat-down.

Upon saying that, I don't see what's wrong with paper votes. Elections don't happen very often, and paper voting scales perfectly fine with population.

If you prefer to read:

https://www.theverge.com/2012/11/6/3609506/voting-machine-el...