Why Most Teams Shouldn't Build a Chat System

There's a moment in every product team's life. The roadmap is open, someone's had a coffee too many - going all out of their mind, and from across the table comes those 5 fateful words: "What if we added chat?" The room nods. It feels obvious. It feels modern . It has that new-feature smell. Nobody asks why. Nobody does the math. The ticket gets created, the estimate gets wildly undershot, and six months later a senior dev is at 2am debugging why messages arrive out of order for users in Southeast Asia. This post is an intervention. 🎭 Chat Looks Simple. Chat Is Not Simple. The cruel trick of chat is that the demo takes about four hours to build. WebSockets, a text input, a message list, boom, you're basically WhatsApp. Ship it. Then your first real user shows up. Suddenly you need to handle: 📬 Message delivery guarantees: Did the message actually arrive, or did the socket drop silently? Better build acknowledgment logic. Better handle retries. Better make sure the retry doesn't deliver