The whole system on one page. Keep it open; we'll walk through every box. Picture a typical web shop. One team owns the product catalog, another owns orders, a third owns user profiles. In the beginning, everyone works in one frontend and one backend. It's simple, and that's fine. Then the company grows. Ten developers become fifty. Every release needs everyone to agree. A small bug on the profile page blocks the orders team from shipping. A routine library upgrade turns into a three-week...