Flix looks interesting, the Java interop seem to be a great feature too, but I'm wondering if they'll have traction. The JVM already has Scala, and while it's not exactly the same thing it will be "good enough" for most people. Considering Scala has usually lots of churn and already a split ecosystem, plus the upcoming transition to 3, it's going to be hard to find a place. Especially since Java itself is gaining pattern matching, records and the like.