Quite a few "new" languages target the JVM and thus use JVM GCs, which are all state of the art. E.g. Kotlin, Clojure, Scala. And of course then there are the n

Quite a few "new" languages target the JVM and thus use JVM GCs, which are all state of the art. E.g. Kotlin, Clojure, Scala. And of course then there are the new implementations of other languages, like what Chris works on (Ruby), which also run on the JVM. Most new languages are either high level languages and running on the JVM, or they're attempts to compete with C/C++ like Rust, Swift, Zig etc and thus don't use GC at all. I don't think many people use Boehm anymore.