Like any tool, there is nothing that cannot be done without microservices. However that doesn't mean they never make sense. Microservices have certain costs and certain benefits. I can believe there are certain situations where the benefits outweigh the costs. Its just not most situations. But that doesn't mean it never exists. I could believe it makes sense in extremely large apps with huge number of different groups working on them, where the communication complexity outweighs the other complexities microservices bring.