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Re:Java 18 / JDK 18: General Availability by jillesvangurp on Wednesday March 23, 2022 @04:43AM (#30776362)
Technically yes, but most users would run something more modern. It does not make sense to use Kotlin and then be conservative with the JVM runtime.

Intellij is written in Kotlin. It does Kotlin really well. Better than Java even.

Re:Java 18 / JDK 18: General Availability by pjmlp on Wednesday March 23, 2022 @12:45PM (#30780424)
It isn't what Android devs say, always complaining about compilation times, IDE freeze ups with.

InteliJ is partially written in Kotlin, unless they decided to port everything on top of Kotlin/Native.

As for why Kotlin exists at all,

> 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...