Definitely not everyone. Referring back to stolen code would be high risk and minimal return. Instant dismissal with chance of lawsuit style risk. I periodical

Definitely not everyone. Referring back to stolen code would be high risk and minimal return. Instant dismissal with chance of lawsuit style risk. I periodically have to reimplement things from scratch and that is indeed irritating. Fortunately version N is usually better than N-1. The solution to that annoyance is open source.