Ask HN: What's the most frustrating part of software development for you?

I'm a software engineer who's been building products for over 8 years at companies small and large.

To me, the hardest part about my job is dealing with non-existent or poorly written documentation that is often out of date. I'd like to know what the hardest part is for you, and how you currently solve for it.

Full disclosure: My co-founder and I are working on AppLens (https://applens.io) - an enterprise SaaS application that aims to solve this problem. If you're a dev, we'd love to talk to you about your pains and what we can build to solve them for you.