I'm not sure I agree that they increase accuracy to the point that it would be worth the downsides. A room full of people who all don't trust one another I feel can do a fairly good job of reducing the errors down to a minimum. Again, I could be wrong, and I'd love to see a study or some research in this area that proves me wrong! (after all, history shows us that a crowd of like-minded people are capable of some very shitty things without some kind of checks and balances)
And while I'm sure they save some money, is it worth it? I'd like to get an idea of the scale involved. Because saving a few hundred thousand dollars a year for a state would make it absolutely not worth it in my opinion, but a few hundred million might be.
And finding exact numbers is extremely hard (at least for me), combined with the fact that these companies basically never release that kind of information, and I know it's not the best idea to read into these things, but I can't help but think that they would release these numbers if they were significant and showed the company saving tons of money for the state.
But i completely agree that there are much better things we can do to improve voting overall (personally my vote is for changing to a "ranked voting" system), but these machines still feel like a giant red flag to me. There's not a lot that can be done to swing an election by just a few people, but put some kind of electronic or computerized system in the mix, and now there's one dock worker that has access to a large number of the machines as they get shipped, and now you have a single point of failure.