Building software has never been faster. AI turns a rough idea into a working feature in an afternoon, and for the most part that's wonderful. But speed changes where things go wrong. After reviewing a lot of products just before launch, I've noticed the failures rarely live in the code itself. They live in the gaps between features, in the moments nobody thought to describe.
Here's the pattern.
The happy path works. Everything around it doesn't.
AI is very good at building the path you asked for. Sign up, create a project, invite a teammate: it all works when you do it in the expected order, with the expected data, on the first try.
Real users don't do that. They refresh halfway through. They open two tabs. They paste in an emoji, a 500-character company name, a date in the wrong format. The question that matters before launch isn't "does it work?" It's "what happens if…?"
- What happens if the payment succeeds but the account isn't created?
- What happens if two people edit the same record at once?
- What happens if someone lands on step three without doing step one?
None of these are code bugs, exactly. They're undefined behaviours: decisions the product was never asked to make.
Business rules quietly contradict each other
When features are built quickly and separately, each one is reasonable on its own. Together, they disagree. One flow says a trial lasts 14 days; another says access ends the moment the card fails. One screen lets you delete a workspace; another assumes it always exists.
Nobody decided this. It emerged. And it only surfaces when a real user walks a path that crosses two features you built three weeks apart.
The fix isn't more testing. It's product thinking.
You can't test your way out of a decision that was never made. What helps is stepping back and thinking through the product the way a user will experience it, not the way it was built: journeys end to end, edge cases, the ugly middle states.
That's the whole idea behind a Launch Review. One experienced human looks across your product before real users do, and tells you plainly what's worth resolving first.
If you're getting close to launch and that "what happens if…" feeling is nagging at you, that's usually a good sign it's worth one more check.