What does 'Run as User' feature in subflows primarily affect?

The 'Run as User' feature in subflows mainly impacts the data access level during flow operations. This capability allows the flow to execute actions with the context and permissions of a specified user, rather than the user who triggered the flow. This means that the flow can access records and data that the triggering user might not have had permission to access on their own, thus allowing for greater flexibility and functionality within the process.

For instance, if a flow needs to access sensitive data or modify records across different user roles, utilizing 'Run as User' ensures that it operates under the correct access rights. This feature is essential in scenarios where certain operations require elevated permissions, ensuring that the flow consistently performs the necessary actions without encountering permission issues.

In contrast, other options such as resource allocation, user interface layout, and execution speed are not directly influenced by the execution context established by the 'Run as User' setting. While they may affect the overall performance or experience of the workflow, they do not relate to the underlying access control features provided by the 'Run as User' functionality.