Why is it important to have real-time data migration into a data warehouse?

This question is meant to explore your understanding of the link between data migration and the business objectives of the organization. The data migration in itself is only as useful as the information it provides to the organization to run the business. Understanding the link between these two processes is critical. The interviewer is seeking to confirm that you are aware of this.

"The purpose of a data warehouse is to provide useful information to the business and its decision-makers. Real-time data migration into the warehouse enables the decision-makers to have the latest data with which to manage the business. This is especially important for companies that use OLTP, such as retailers or financial firms."