Many companies are adopting microservices for both re-architecting existing applications and starting brand-new projects. Microservices break large applications into smaller pieces, offering benefits such as scalability, resilience, and agility. However, they also introduce challenges like data distribution and consistency management. It is crucial to understand access patterns and use cases before designing an effective microservices architecture. Martin Fowler suggests that microservices only make sense at a certain scale and complexity, emphasizing the importance of understanding requirements before applying them.