The complexity of version numbering for viewers and the code dumps coming from Linden Lab make clearly telling you what version and features your likely to encounter nearly impossible. There has been a load of code added to the S21(6) and changing to RC3, while logical to a developer, doesn’t really tell the user the extent of the changes. I think of Release Candidates as less about features and new code than about bug fixes. This new version is more about new code.

Kirsten puts it very in the release announcement writing:
S21(6) is now a superset of Viewer-Development, Viewer-Mesh, Viewer-XMPP and Viewer-Social 😀
It has been a monster to get everything working, however the result is a viewer of epic cutting edge niceness.
I don’t know what is called when beyond the Bleeding Edge of tech development, but whatever that is, is where this viewer is.

