[The_rationalist]

You can and you should use Java libs where appropriate. It's always nice to have pure idiomatic Kotlin but calling Java from Kotlin is already idiomatic.

As for multi platform io they are working on it https://github.com/Kotlin/kotlinx-io

[vips7L]

But the discussion was about Kotlin AOT. Not kotlin JVM.

[The_rationalist]

Right but using graal native instead of kotlin native you can have kotlin calling Java code and compiling to a binary