Come now, people, let's not get carried away. I occasionally look back at some old paper files I have, and can't help but wonder how we could be so unproductive in the past. Just reading some of those memos we had to write, get typed, proofread, correct or re-type, then hand-carry, seems absurd now. Never mind having to take trips to the library took look things up, having to mail or fed-ex documents individually to every person who needed them, having to waste time in "face to face" meetings when a brief teleconference would have been more than enough, and on and on.
Nostalgia makes for a nice escape, but it doesn't get things done. I understand the wish to go back to simpler times, but they have their own complications. Carbon paper used to be a real security hole for purely mechanical typewriters, and I would bet that the device pictured has its own set of vulnerabilities. The most effective network security barrier is still an air gap, although even that takes more care than it used to.
It is a security truth that the only secure system is one that is turned off and sealed in a box. The degree that it varies from that is how insecure it is, but also how useful it is.
Undoubtedly electronic devices are in danger of security breaches when they are connected online. Wouldn't the best way be to just disconnect and go offline? With paper and typewriter, there is obvious undesirable consumption of paper as well as typo correction fluids, not really environmentally friendly compared to backspace key.