I think i'm even more confused. Why would my rental car need network access at all? (it's already a shame and a great source of cost/problems that it has any el

I think i'm even more confused. Why would my rental car need network access at all? (it's already a shame and a great source of cost/problems that it has any electronics) Also, what prevents my TLS/SSH/whatever certs from working in an offline setup? i do that all the time without downsides, so i'm probably missing your point. if you have a page explaining your project and usecase feel free to link