"It just works" is great and imo arguably the ideal design in a lot of use cases. The problem here is that the code wasn't adequately tested. It "just works" in

"It just works" is great and imo arguably the ideal design in a lot of use cases. The problem here is that the code wasn't adequately tested. It "just works" in the circumstances that the app designers thought of when they were making it, and it "may or may not work if you're lucky" the rest of the time.