Which extensibility type does SAP recommend for enhancing the existing UI of an SAP Fiori app?

The recommended extensibility type for enhancing the existing UI of an SAP Fiori app is the key user extensibility approach. This method is designed for business users who require the ability to make adjustments and improvements to the user interface without needing deep technical skills or access to development environments.

Key user extensibility allows users to personalize the interface by adding, modifying, or hiding UI elements directly within the Fiori apps. This empowers users to tailor their experience according to their specific needs and preferences, enhancing usability and productivity within their unique work contexts. Additionally, this approach promotes agility since business users can implement changes quickly without going through lengthy development cycles.

While the developer extensibility option is more suited for comprehensive customizations that require coding, and classic extensibility involves changes to the original codebase, key user extensibility strikes a balance by enabling impactful yet straightforward enhancements. The side-by-side approach typically involves integrating and extending Fiori apps with other solutions, but it may not be ideal for simple UI modifications within an existing app context.

In summary, key user extensibility is the most appropriate choice when it comes to impactful UI changes in SAP Fiori applications, making it the preferred recommendation by SAP.