I sent an email to support asking about a possible Sound Forge update and they said the following:
"Currently, there are no official plans or announcements for the next release in the SOUND FORGE product line. At this point, we can't really say what the future holds for this line and what a future release schedule could look like. Such decisions may come during the course of this and next year, where there will be a lot of rethinking of product/company strategy and portfolio".