Build a system as simple as possible but no simpler.

An 1800s telegraph system doesnt work in the modem world, there is far too much communication and the system would just collapse into molten slag.

All those things you've listed are because we live in an adversarial world and I'd steal all your money off the telegraph wire if you tried it.

Having worked in hardware for a moment, everything we do in software is like this. Even C.

There are a whole series of blog posts from the Fishworks guys explaining why it could possibly be so hard to turn on one LED.

But Oracle probably deleted then so you'll have to find them on archive.org.