> Failure means minor inconvenience for a lot of people.

That alone makes software more critical than we give it credit for. Especially if there's many people.

Let's say you've got some mildly popular piece of software, with 10,000 users. Let's say a particular inconvenience means they each waste like 10 seconds per day. Total waste is 100,000 seconds per day, or 28 hours. Per day.

This adds up pretty quickly.