If you do early voting, you can only vote electronically. If you vote on election day, you can choose a paper ballot if you wish. Early voting is electronic only because you can vote anywhere in the city (if you work downtown you can do so on your lunch break no matter where in the city you live) and there are dozens of different ballots because we vote on things at the neighborhood level in addition to state and national candidates. Having paper ballots would be quite challenging.
Thankfully we can be sure that our votes have not been compromised in the past and there are no actors in the system who might benefit from avoiding looking into possible compromises.
Oh wait..
What motivation do they have to fix a system that put them in office in the first place? (hint: none, there is no motivation)