@mattblaze It's been too long since I last engaged with voting systems, or even worked at a precinct on voting day.
Last time I worked an election - just before Covid - I was surprised how many voters chose to fill out the bubbles or draw the lines on paper ballots rather than use the ballot marking machines. It was perhaps a 10:1 ratio.
(I personally prefer the ballot marking devices because I have trouble making accurate marks with a hand-held pen.)
When I did my first company I discovered the wonder and value of double entry ledgers. And when I began to get involved with voting I was impressed how far my state (California) and the counties had created and deployed layers of cross checks that make it hard for voters (or voting workers) to make uncaught mistakes or for outside actors to interfere.
I would like to give flowers to whoever thought of the idea of provisional ballots.