The 1.09 update was a significant milestone for Elden Ring , not necessarily for new content (no new bosses or lands), but for how it fundamentally changed the "meta" of the game and introduced graphical features that were promised pre-launch.
For those familiar with the "scene," Elamigos was a well-known repacker (often associated with FitGirl or other compression groups). Here is a technical review of the 1.08-1.09 update release specifically: Elden Ring update 1.08.0 - 1.09.0 -Elamigos- ...