Custom e‑commerce stacks were built as competitive advantage: tailor every interaction, own your checkout, and mold the experience around your brand. For many merchants, that advantage quietly calcified into a tax—security patches, integration fragility, escalating cloud bills, and months of developer time spent on upkeep instead of experiments. The result is predictable: roadmaps that stall, feature backlogs that grow, and teams that stop asking “Can we build this?” and start asking “Can we...