There is a great need for technological independence. At any point in time, there is a shift in languages and adoption rates change accordingly. Companies such as Walmart have left the Java stack and moved towards the MEAN stack. Today's modern applications are not just limited to the web interface and extends its need for mobile and smartwatch application too. So, coding everything in one language is not at all a feasible option. We need an architecture or ecosystem where multiple languages can coexist and communicate with each other. For example, we may have REST APIs exposed in Go, Node.js, and Spring Boot—a gateway as the single point of contact for the frontend.