Not only are they quite open it is a means to cash in more InteliJ licenses, the community has generally an anti-Java sentiment, especially on Android, as if it doesn't depend on the ecosystem for its own existence.
The language might have a great design, however for me that is off-putting and makes me rather play with other JVM languages, like Clojure.
"The next thing is also fairly straightforward: we expect Kotlin to drive the sales of IntelliJ IDEA. We’re working on a new language, but we do not plan to replace the entire ecosystem of libraries that have been built for the JVM. So you’re likely to keep using Spring and Hibernate, or other similar frameworks, in your projects built with Kotlin. And while the development tools for Kotlin itself are going to be free and open-source, the support for the enterprise development frameworks and tools will remain part of IntelliJ IDEA Ultimate, the commercial version of the IDE. And of course the framework support will be fully integrated with Kotlin."
Not only are they quite open it is a means to cash in more InteliJ licenses, the community has generally an anti-Java sentiment, especially on Android, as if it doesn't depend on the ecosystem for its own existence.
The language might have a great design, however for me that is off-putting and makes me rather play with other JVM languages, like Clojure.
"The next thing is also fairly straightforward: we expect Kotlin to drive the sales of IntelliJ IDEA. We’re working on a new language, but we do not plan to replace the entire ecosystem of libraries that have been built for the JVM. So you’re likely to keep using Spring and Hibernate, or other similar frameworks, in your projects built with Kotlin. And while the development tools for Kotlin itself are going to be free and open-source, the support for the enterprise development frameworks and tools will remain part of IntelliJ IDEA Ultimate, the commercial version of the IDE. And of course the framework support will be fully integrated with Kotlin."
https://blog.jetbrains.com/kotlin/2011/08/why-jetbrains-need...