Yes, that does goes without saying for unvetted sources, what you say is just a less formalized way of saying, follow Descartes Rules of Method. That said, the

Yes, that does goes without saying for unvetted sources, what you say is just a less formalized way of saying, follow Descartes Rules of Method. That said, the handling of the tech received a seal of approval from me, and I've quite a bit of professional background in IT System's Engineering, and a periphery of Cyber. I mean what they do really is not that much of a leap, and would improve existing security by orders of magnitude by eliminating swatches of attack surface that the worst of the worst malware out there uses today. Punch cards (upgraded) -> Optical printouts that can be physically changed to load firmware and and the functional software from a physically modifiable medium. (A known working, knokwn safe state at the lowest level). No persistent internal state at the hardware/firmware controller levels (for bad actors to abuse with an APT such as some of the DMA shennanigans, hooking, and bus tricks). Non-networked except between critical fortified systems (to limit spread). Sure you take some performance hits, but its resilient with few single points of failure (such as the physical medium).