There are a few "copy-cats", but it shows that the creators lacked the experience and time to really think about how to achieve coherence of language constructs and how different parts play together.
In addition to that, Scala has a huge head-start and is quite stable and mature. The language is expressive enough that I can't envision many features which couldn't be expressed with the existing language.
For example, Scala.js didn't require any language extensions at all.
There are a few "copy-cats", but it shows that the creators lacked the experience and time to really think about how to achieve coherence of language constructs and how different parts play together.
In addition to that, Scala has a huge head-start and is quite stable and mature. The language is expressive enough that I can't envision many features which couldn't be expressed with the existing language. For example, Scala.js didn't require any language extensions at all.