Thanks for the response Nick. I didn't think it actually promoted the old themes, but rather provided separation, made it clearly obvious that the old has been deprecated and lastly produced significantly less noise when doing a search in the support forum.
For example if I were to do a search now in the streamline forum on an issue I am having with say 2.0. Almost all the results could be for 1.0 but I wouldn't know until I went through every thread. Granted the reverse is also true, if I searched for something regarding Streamline 1.0, most of the results could be 2.0 instead.
But again I understand the desire to not create new forums. Thanks again for the reply.