"So we've known for 20 years that this is a problem, so why does it even happen? I think the problem is that most people don't know how things work. Like the IT guy 20 years ago, they can't look at it and immediately understand the implications and see what's wrong. So, they keep using it. This perpetuates itself into legacy code that we can never get rid of. It's mainframes, 20 years out of date and still a 50-billion dollar a year business for IBM."

True. Basic incompetence. The bell curve, yada, yada