The text highlights how despite being seen as outdated, SMS is proving itself to be a resilient messaging format that continues to reappear with new use cases. It emphasizes the simplicity and directness of SMS, which allows for quick and easy interactions without requiring downloads or complex interfaces. With its large user base and permanent connection to users, SMS offers several advantages over other messaging services, including reliable identification of users, broad reach, and ubiquity. The text also showcases examples of successful SMS use cases in customer support, marketing, and sales, such as Digit and Magic, which demonstrate how SMS can be used effectively without adding unnecessary features or complexity. Ultimately, the resilience of SMS suggests that it will continue to coexist with other messaging services, including those with more advanced features, as users are likely to use multiple apps for different purposes.