I write software that we use daily, and we still find things in the wild that we would never find until the thing in the wild occurs. Luckily for me, none of these found in the wild issues interfere with people's lives and just means a file gets completed a little closer to the deadline. I'm fine with that.

Not sure if this situation falls under the "push it to prod and let the users QA it" or if this is truly edge case situations. It's easy to bash and make fun of, but I've been in the trenches of catching what is an edge case for most people but run of the mill for those providing the data to me.