For a bit of history, here's how CD Projekt handled updates to The Witcher games.
The Witcher: Released October 2007, updated with four major bug-fixing patches. The free Enhanced Edition released in September 2008, incorporating all prior fixes while overhauling many models, animations, and improving translations. Followed with Patch 1.5, which added community-made quests and removed DRM.
The Witcher 2: Released May 2011, followed with patch four patches before 2.0. Patch 2.0 introduced an entirely new tutorial, a higher difficulty level, and a combat arena mode. Then came Patch 2.1, then the free Enhanced Edition, aka patch 3.0, which released in April 2012 and incorporated prior fixes while adding new quests, cinematics, locations and cutscenes, along with more fixes. Followed by four smaller patches, the last of which added mod support.
The Witcher 3: Released May 2015, updated with 18 patches by September 2016's patch 1.30. Patch 1.30 coincided with the Game of the Year Edition re-release, which incorporated all DLC, both expansions, and many more fixes. Consoles received more patches to improve performance on Xbox One X and PS4 Pro.