Yes, kind of... for instance you can use Virtual Threads now from Clojure:

https://clojure.org/news/2026/03/11/async_virtual_threads

I'm pretty sure all of Clojure runs on Java 8, so if you use some new feature I'm guessing you need to provide a fallback - but you're also going to be running on Javascript and other platforms, so that's par for the course