Why might a user prefer to utilize Named Credentials?

Named Credentials provide a streamlined approach to managing authentication details needed to access external systems. When users set up Named Credentials in Salesforce, they can define the authentication mechanism along with the endpoint URL in a single location. This simplifies the process for developers and administrators, reducing the complexity associated with managing multiple authentication settings across various integration points.

By utilizing Named Credentials, users do not have to hard-code authentication information directly into their integration code, which minimizes the risk of exposing sensitive data and makes maintaining and updating authentication parameters much easier. This centralized management can lead to more secure and maintainable integration solutions.

The other options do not provide the same benefits in terms of authentication management and simplification. For instance, manually managing injections can introduce additional risks and complexities rather than alleviating them. Eliminating external API services contradicts the very purpose of integration, which is to connect with external systems. Integrating legacy systems is an important consideration but is not specifically a benefit of using Named Credentials; rather, it relates to the broader context of integration strategies.