Reactive principles are not something new. They have been tried and tested over a number of decades, and now the community has embraced them with the reactive manifesto, making them more common and popular than ever.

Microservices is an architecture which has learned from the successes and failures of SOA. It has used all the good methodologies and rearchitected them from ground up, primarily using reactive principles and modern infrastructure. Microservices are one of the best examples of the implementation of the reactive manifesto.

One of the principles of the microservices architecture is to divide and conquer, where you decompose the larger system into isolated subsystems based on microservices using bounded context-based decomposition. Microservices are more than just a list of principles and technologies. They are the way to approach the building of a complex system design.