Man hackers would love you. Memory vulnerabilities are still one of if not the main cause of vulnerabilities in unsafe languages. Yes this even applies to large projects ran by experienced and skilled people like the Linux kernel. Stop thinking your the exception, because I guarantee you aren’t but even if you were you can’t read all of the code in the world in your lifetime. Nor can you write all the code in the world.

IP over ham radio is a thing, so yes. Wouldn’t be very fast mind you.

Using cloud services as the only copy is literally what I have been told to do working on my PhD by my supervisors. This is in the cybersecurity department. How you think this attitude is acceptable or normal is beyond me.

The whole point of modern cloud platforms is they worry about this so you don’t have to. Not that people ever actually followed 321 backup policy anyway.

Edit: at least my stuff is on two different cloud services.