Your eCommerce platform can look perfect on paper and still become a bottleneck six months after launch, somehow.The reason is simple and also not so simple. In 2026, picking an eCommerce technology stack is no longer just about choosing a platform with the right features. Now it’s more about deciding how your storefront, backend, APIs, content, checkout, search, payments, and customer experiences will “click” together. That pulls two approaches into focus: • headless commerce and • composable