The text discusses the challenges and opportunities of personalization in modern applications, particularly with regards to handling large volumes of data. Traditional relational databases are struggling to keep up with the demands of personalization due to their limited scalability and processing power. In contrast, NoSQL distributed databases like Couchbase can handle high-traffic workloads and provide flexible schema designs that enable efficient data processing and storage. The examples provided by Dominos Pizza, Marriott, and Comcast illustrate how Couchbase has enabled these companies to create personalized experiences for their customers, improve customer support, and gain valuable insights into customer behavior. By leveraging the scalability, flexibility, and performance of Couchbase, organizations can overcome the challenges of personalization and deliver more effective and efficient solutions.