SAP S/4HANA is SAP’s latest-generation ERP system. It’s robust, feature-rich, and cloud-first. But for most enterprises, especially those migrating from SAP ECC, the path to full implementation is anything but smooth. SAP S/4HANA implementations typically take 2+ years and millions in budget, with significant risk of losing custom functionalities. SAP’s “clean core” strategy requires keeping customizations external to the ERP—creating an integration opportunity.