Then Trump vs Clinton came around, and it seems no one remembered that the easily hackable voting machines were even there. But they were. What role did they play in the election? Without a paper trail, we may never know.
Apart from the travesty that is the easily hackable electronic voting machine, there are also electronic vote counting machines. In my own district, we voted on paper ballots which where then directly placed in to electronic vote counting machines. If those are hacked they can give out any vote total the hacker wants, perhaps just outside the margin required for a manual recount.
Any election where either electronic voting machines or electronic vote counting machines were used should not be trusted. When there's no paper trail, it's even worse, but even where there is the laws might not allow a hand recount.
The use of either of these types of machines might explain why exit poll numbers and predictions have been so wildly off the mark in recent years.