I work on a medium Spring app (~250,000 loc). Three years ago, our stack was Spring + Java. Now, we have transitioned our app to Spring Boot and Kotlin and I b

I work on a medium Spring app (~250,000 loc). Three years ago, our stack was Spring + Java. Now, we have transitioned our app to Spring Boot and Kotlin and I begin to appreciate this stack. No xml configuration, only code (or, more precisely, annotations that rely on reflexion), Kotlin data class for model, simple controller etc... I quite like it. I come from a Python backend background with a lot of misconceptions about Java/Spring, and I like that our app can be bundled in a single "fat Jar" with all its dependencies. Much more pleasant (in my option) that the Python deployment story. One think that I still dislike is the MVC template engines (we use Thymeleaf): they fill "ancient" to me and I would welcome something more "static" (like a Kotlin dsl for instance).