Searching speaker to tell about bleeding edge of Scala improvement

Greetings. Our user group:

is planning to arrange our next meetup, on Feb.27:

We would be glad to invite core commiters, to speak remotely or live, about expected improvements to Scala runtime, compiler, tools. We are also curious about requirements to contributors, wishing to join improvements. Since we are not following general discussions - we would have to understand the whole picture.

My personal interest is to implement XSLT 3.0 processor, in Scala.