Micronaut Framework 5.0 supports Kotlin 2.3

Micronaut Framework 5.0, scheduled for Q2 2026, will support Kotlin 2.3. Key Kotlin 2.3 highlights include language improvements (unused return value checker, explicit backing fields), Java 25 support on the JVM, Swift export improvements for Kotlin/Native, new Kotlin/Wasm exception handling defaults, experimental suspend function export for Kotlin/JS, Gradle 9.0 compatibility, and stable time tracking in the standard library.