As an Estonian who has voted online and via mobile ID for years, couldn't imagine going to vote in a physical location, using pen and paper.
Whose to stop bad actors from manipulating electronic votes? Whose to say your vote was even tallied? It is far easier to manipulate elections electronically. If Russian operatives are able to penetrate election systems in the behemoth of the US, do you feel confident that they are leaving your Estonian system in their immediate sphere of influence alone? It would potentially take one engineer and one computer to manipulate an electronic election. It would take a team of people, equipment, trucks, incinerators, fake ballots, whatever to do the same manipulation to millions of physical paper ballots stored in secure facilities.
Every state in the US can have a different system in place for the actual voting process. These systems also change over time. Pen and paper is used in plenty of the US, just not necessarily in your district.
Of course the pen-and-paper system is designed to be electronically scanned, at least.
Is coercion or vote buying acceptable trade off for mild inconvenience?