Actors (not akka's) used to ship as part of the standard library. I'd argue it's been the killer app that drove many people in, in Scala's early days. At some p

Actors (not akka's) used to ship as part of the standard library. I'd argue it's been the killer app that drove many people in, in Scala's early days. At some point Akka grew bigger and matured so the original actor library was spun off in its own library, basically deprecating it in favor of akka.