Kotlin dog food?

Curious... is JetBrains using Kotlin to develop IntelliJ or any other important projects? I'm wondering how much I should worry about this language disappearing on me. My sometimes preference for bleeding edge tools has gotten me in trouble before...

Rob

We have two internal systems (one of them a very important one) written entirely in Kotlin. These days we are starting to introduce it to the IntelliJ code base.