Legacy Sound Content
The sound package Electric Keys have replaced the packages Wurlitzer E-Piano, Rhodes Mark II E-Piano, and Clavinet E-Piano, and they are now marked as legacy content. Electric Keys features even deeper sampling of respective instrument, and a whole set of presets, and clips.
If you have a Bitwig Studio project that uses legacy packages, the content will still be available.
(By the way, if you’re looking for legacy content, just right click anywhere in the Pop-up browser and check the Include Legacy Content option.)