Those who look at the git tree or the mailing list will have noticed that we did tagged a 2.0 (and 2.0.1) release -- but we then decided not to announce this and instead go straight for a Subsurface 2.1 release.

The reason to skip 2.0 is simple -- we added localization and about a dozen languages right after tagging 2.0; things are going very well with this and since a lot of divers appear to prefer localized software, we decided to wait another week or two and release localized binaries for Windows, Mac and Linux instead.