Season of the Drifter was removed from the game in November 2020. The expansion also included the Destiny 2 base game, Forsaken, and the previous two expansions, Curse of Osiris and Warmind. The release coincided with patch version 2.0 for Destiny 2, which made fundamental changes to the core functionality for all players.
See also: Destiny 2, Destiny 2: The Witch Queen, Destiny 2 post-release content, Destiny 2: Shadowkeep, Destiny 2: Beyond Light, Drifters (manga).