I think it's mostly the culture surrounding SAP. SAP developers are a lot of times slow to adapt to new technology. For the UI you can use react components https://sap.github.io/ui5-webcomponents-react/?path=/story/g... or you can just generate OData services from CDS Views that are then integrated into your frontend https://blogs.sap.com/2022/02/24/sap-cds-for-new-and-experie.... The problem is that a lot of people use SAP as a front end, which is wrong in my experience.