My guess is it will be out 8-9 weeks after there are alpha builds available for Rack v2.0, give or take.
- Continue working on Rack v2 and Rack for DAWs.
- Once both are “alpha” quality, release Rack v2 source code.
- Wait at least 4 weeks while testers and plugin developers review the code.
- Once both are “beta” quality, begin providing development builds of Rack v2. Send Rack for DAWs builds and licenses to testers.
- Wait at least 2 weeks for users to review the development builds.
- Once Rack v2 is “stable” quality, release it.
- Wait at least 2 weeks.
- Once marketing is ready, release Rack for DAWs.
source: Rack development blog