And the idea that corporate developers or even frankly any developers are switching to LLVM and WebAssembly en masse is pretty ridiculous.
Java as a language may be getting less developer interest but Scala, Clojure and Kotlin are as strong as ever.
However Kotlin can be targeted to other platforms as well. Kotlin can target JavaScript ( https://kotlinlang.org/docs/reference/js-overview.html ).
Also the Kotlin compiler has a LLVM based backend which can compile native binaries, without use of any VM ( https://kotlinlang.org/docs/reference/native-overview.html ).
My main non-JVM use of Kotlin is that when I want to use some arcane aspect of Kotlin, which I may not be too familiar with, I might write and test a small toy function on the command line using it and then copying it over to a big Android Kotlin project, as opposed to trying to work out how to use the arcane feature in the middle of a big Android project.