Despite the promises of SOA, implementing this approach often increased complexity and introduced bottlenecks. Maintenance costs became high and ESB middleware expensive. Services tended to be large. They often shared dependencies and data storage. In the end, SOAs often resulted in a ‘Distributed Monolithic’ structure with centralized services that were resistant to change.

So we should evolve our architecture to microservices architecture in order to accommodate business adaptations faster time-to-market and handle larger requests.