HN user
Best at what? You've link to a notoriously unscientific index which counts search engine results. How does that make one language universally better than all others "period". I've coded in Java for most of my career, but the blind blinkered faith in the language within the Java community never ceases to amaze me. It's one tool available among many, look a little further than that single hammer which you worship in your toolbox.
It's a mistake to think of one "main" language. There's a limit to what can be fed back into the Java language. Other languages like Clojure and Scala have more than enough going for them and stand on their own merits. I'm seeing increasing numbers of teams relegate Java code to legacy status in favor of newer JVM languages.
I've been using Java since the 90s. The JVM is a pretty solid piece of engineering, but your post is pretty heavily loaded with hyperbole. There are plenty of other excellent concurrency platforms for example Erlang, Go, even the. NET CLR.
The Lombok stuff is pretty nasty, all kinds of hacks to hook into the compiler internals in unnatural ways. If you want those features just use a language which provides them, rather than awkwardly bolting them onto a language that doesn't.