For the past few years, I've used Scala every time I need to do something on JVM (which isn't too often). Otherwise I use Python or C++. I don't blog about it.

Scala is clearly an improvement over Java (although I wish they'd kept a C-style for loop). I happen to slightly prefer it to Clojure (which is also better than Java for my purposes).

In the non-Java JVM ecosystem, there are always these angry bucket-of-crabs posts from enthusiasts. Ignore them.