I'm still building most projects using Spring Boot and Kotlin. While Spring can probably be classified as a popular framework for the Java language I don't see

I'm still building most projects using Spring Boot and Kotlin. While Spring can probably be classified as a popular framework for the Java language I don't see it being used a lot in combination with Kotlin. For me personally it's a very productive framework for backend APIs or web projects with server side templating with Thymeleaf as the template engine. My setup combines the flexibility/configuration/productivity of Spring Boot (and the full JVM library ecosystem) with the modern language features and ergonomics of Kotlin. I keep things simple in most of my projects. No reactive/coroutines/graalvm. One-thread-per-request blocking model is good enough for most of my use cases. Annotation based DI and configuration.