Earlier quoted context omitted.
Outside of Apple's ecosystem, is anyone using Swift? Kotlin is growing in all areas, especially backend (being fully embraced by Spring/Spring Boot et al).
Spring embraces all JVM languages that can bring them new customers.
Re: Swift/Java interoperability tools and libraries
#21They have gone hard on Kotlin. Very hard. For example, in all of Spring/Boot's documentation, you will find Java and Kotlin examples, but not other JVM languages.