From the article:

"Pennsylvania, Georgia and South Carolina are on course to replace all paperless voting machines by 2020, while Arkansas, Virginia and Delaware have already completed this process."

We're lucky; they made it just in time. Imagine if this was a potential concern for Georgia or Pennsylvania right now.

To save you a click, the 8 remaining states are Texas, Louisiana, Tennessee, Mississippi, Kansas, Indiana, Kentucky and New Jersey. I hope Texas and Indiana, at least, follow suit soon.