There are 2 schools of thought on the Y2K bug, and the one you left out was that quite a lot of money was spent fixing bugs prior to the year 2000, which helped

There are 2 schools of thought on the Y2K bug, and the one you left out was that quite a lot of money was spent fixing bugs prior to the year 2000, which helped ensure that it was a minor event, with minor failures, instead of a bigger problem. There are computer systems we are even just now starting to hear had major problems that were addressed. Yes, there were people hyping it like crazy, and the average personal computer was not really at risk of anything major happening. But there were serious concerns that were addressed prior to 2000. Also, it's likely the 9/11 attacks had less of an impact because of redundancies and backups put in place for the Y2K bug.