Coder Radio's views on using Scala on a free software stack on Trisquel

Recently on Jupier Broadcasting's Coder Radio, someone submitted feedback on using Scala and Play Framework on a complete free software stack on a free software operating system. The email can be referenced at http://slexy.org/view/s21vLV2dmR and it is very interesting in how Michael Dominick responds to the potential of liberating more of his software stack and avoiding vendor lock-in.

You can get the Ogg at http://www.podtrac.com/pts/redirect.ogg/traffic.libsyn.com/jbmirror/cr-0087-ogg.ogg or the YouTube video at https://www.youtube.com/watch?v=R0ds_aMPfls to listen for yourself. The reader's email starts at 9:15 and Michael answers the reader's question at 11:20.

Thoughts? Impressions? I know in the past Michael has championed using C#, Azure, and Microsoft technologies in addition to Java. Is this self ignorance on his end or how most modern developers actually think?