Years ago, when I was a young developer, I was asked to design and implement a complex but usefull feature. It took me some time, but I was really proud of my creation. It passed all the tests and was approved for production deployment. However, while the code was deployed, the customer asked for it to remain disabled for a while.

Months passed, other features were added often breaking the one I created. But I was relentless. I've fixed it every time. I've kept it ready for great launch...

After a few years, when I was already working on a different project, I received an email about my feature. It turned out that everyone simply forgot about it. You might expect that it was finally turned on... Nope, that email was a kind request to remove that feature from code.