What happens when a single-product company decides to build a second—or a third—without unraveling the success of the first? The leap from one product to many rarely doubles the complexity; it multiplies it. Product leaders suddenly face sharper trade-offs: when to place bold bets, how to allocate finite resources, and how to distinguish between transformational expansion and slow erosion of a hard-won core. The challenge isn’t just growth—it’s protecting what already works while building wha...