It’s simple. To write efficient AND maintainable code in java you have to be both very experienced developer in general and proficient in java.

Which most developers are not. So they end up in a pile of piles of crap.

While typescript learning curve is negligible and js single threaded nature helps avoiding overengineering mentality.

So unless you’re shitty js coder, there’s just less reasons and ways to shoot yourself in the foot.

To be fair it’s not applicable to all usecases and situations.

If you need to implement next Kafka - there not much you can do with a beautiful nodejs code.