I don't remember the name, but there's already an Esolang that executes its commands unreliably. Through careful program design, you can ensure that a sequence of commands will execute with 99%, 99.9%, etc. reliability.
Not sure if that was /s or not, but it is indeed an important insight to realize that no IT system can have 100% reliability once you factor in hardware failures and power outages. And that's before we talk about bugs.
