Latest versions are made available, with scope for end user feedback.
Steinberg don’t release updates until they are usable by the broad majority of the userbase, which inevitably causes problems for those on the bleeding edge of DAW use, who might otherwise benefit from using a more stable (read earlier) version since while features are designed to be compatible with future operating systems to the extent that software applications can be supported; legacy systems will not usually support the most up-to-date version of a particular program and as such bugs and the like may be present in existing software given the operating system in use.
Very smart development strategy I’d say and one I have appreciated since steinberg implemented a quicker turnaround for their software.
The situation will be futher enhanced by the unification of the Nuendo and Cubase codebase.