While the move to microservices-based architecture is relatively new, it is already mainstream. A majority of companies are choosing it as their default architecture for new development, and you are not cool if you are not using microservices.
With regards to migrating legacy apps and breaking them down to microservices, companies are showing more conservatism, and rightly so. While the move creates a lot of value, mainly around new features, time to market, and scalability, it also has its complexities and trade-offs.