I get so tired of hearing the school systems stress technology so much, because they are inevitably 20-30 years behind in their understanding of how to best utilize it, leave alone secure their systems. I always fantasized about teaching a computer class that didn't even touch a keyboard for the first half year...
I recall Windows 3.51 was quite secure for the time. But once they merged the DOS branch of the OS with the NT branch, things got a lot worse for several years.
It's good to hear AWS has never been hacked because just about every other company with data has been. A lot of people rely on AWS, and what you are saying is accurate and if they are running their systems correctly, there can be a reasonable expectation that they will be secure. That's nice to know.