I was working on an enterprise web application, there was a legacy system that everyone hated and we replaced it with a more modern one.

We got a ticket from our PO to introduce a 30 sec delay to one of our buttons. It sounded insane, but he explained that L1 support got too many calls and emails where users thought said button was broken.

It wasn’t, they were just used to having to wait up to 5 minutes for it to finish doing its thing, so they didn’t notice when it did it instantly.

We gradually removed that delay, 10 seconds each month, and our users were very happy.