In the 3 years I spent writing Scala, the only major Twitter contribution I remember running into was Finagle (http://twitter.github.io/finagle/ http://twitter.

In the 3 years I spent writing Scala, the only major Twitter contribution I remember running into was Finagle (http://twitter.github.io/finagle/ http://twitter.github.io/finagle/). It might have been a big influence at the time, but these days it's relegated to the scrapheap of older frameworks.