Though, I would argue that many Kotlin and Scala users have a stronger incentive to migrate to Java 11 or later than Java users do. Java 8's JIT compiler and default garbage collector tend to punish you (performance-wise) for using Kotlin or Scala; Java 11 and later have made great strides to improve that.

Not sure about the other languages, but I've been using Clojure with Java 14 and GraalVM 11 for quite some time.

I don't know about Clojure, for example, but Kotlin targeted Java 7 for a long time. By which I mean that the standard library didn't use anything from Java 8 or later, and the compiler would emit Java 7 compatible code by default. You can still compile it to target later versions, though.

It's only fairly recently bumped up to Java 8 being its minimum (and default) Java version.