Project Leader is explaining to teammate how their UI will call my API and it'll run asynchronously in the background. UI guy asks: about error handling? I said the callback listener will be notified if anything goes wrong. I ask the PL, what next? just log and forget about it (that's my sarcasm)? How would anyone know this has failed?

PL says: good point and can worry about this later. Lets first focus on getting things to work.

You know later never comes. Well, except when the customer reports a problem. Its like every disaster movie you've ever seen before