Yes, you’re reading it right, darktable 2.2.1 is already here, one week after the release of the 2.2 series, which brought countless improvements, but it’s a small maintenance update adding a couple of new features, such as the ability to display a dialog window that informs the user when locking of the library and database fails. Starting with this first point release of darktable 2.2, the application will now ask you before deleting the history stack from the Lightable component. Other than that, it looks like darktable 2.2.1 make the features in the Preferences dialog that are greyed out, albeit not yet implemented, more obvious to the user.