While there is unsurprisingly outrage from the community about losing access to a battle royale game that some deemed superior to the newer Warzone, the bigger issue is cosmetics. While the exact reason for this shutdown was not provided, it can be assumed that Activision wants all its players to be engaged with the current Warzone, as that is the game it is releasing paid and free content for. Once that date arrives, the Caldera map and the content available within it will be gone forever.
Activision has announced that Call of Duty: Warzone Caldera, a version of the original game that has remained active since Warzone 2.0 debuted, is being shut down on September 21.