Embedded iPaaS systems aim to make building integrations fast, reduce maintenance, and be accessible enough for anyone in the company to build integrations. However, they often pose challenges and don't live up to their promise, such as requiring detailed knowledge of data models and product internals that only engineers have. Alternatives like building integrations in-house, closed unified APIs, and open unified APIs offer better solutions, including full control over integrations, low maintenance, uniform documentation, and support, as well as the ability to customize and extend integrations. Each alternative has its benefits and drawbacks, and choosing the right one depends on specific use-cases and requirements.