*In MarTech’s “MarTechBot explains it all” feature, we pose a marketing question to our very own MarTechBot, which is trained on the MarTech website archives and has access to the broader internet.* **Question: **What are the specific ‘hidden costs’ of moving from a monolithic marketing cloud (like Adobe or Salesforce) to a best-of-breed composable stack, and how do we measure the impact on speed-to-market? **MarTechBot’s answer: **The shift from a monolithic suite to a composable stack is often framed in terms of flexibility and innovation. In practice, the tradeoffs show up in less visible ways — especially in cost structure and operational drag. ## The hidden costs **Integration overhead becomes permanent, not transitional** With a monolith, integration is largely abstracted. In a composable model, integration becomes an ongoing responsibility — APIs break, schemas change and dependencies multiply. This creates a persistent engineering tax, not a one-time setup cost.…