[vorg]

> Most languages want to become mainstream (including Scala), most of them just fail to achieve that goal for a variety of reasons, often due to their design decisions

A language will often become used in one particular domain, often not the domain it was designed for. Take another JVM language Groovy -- it's used a lot for scripting throwaways used in testing, including build files for Gradle, and was extended with a meta-object protocol for Grails which has risen and fallen in sync with Rails. But then its backers retrofitted it with a static typing system and have tried to promote it for building systems, both on the JVM and Android but virtually no-one's biting.