WoW Forever has a memory leak problem. After one or two hours of play, RAM usage climbs and the game gets noticeably slower — stutter when turning the camera, longer loading times, choppy frames in capitals.
Restarting the client helps temporarily, but that gets old fast. The leak is tied to how the client handles UI and addon data, so simply disabling addons reduces but doesn’t remove it.
I found a solid explanation of why WoW Forever slows down and how to fix the memory leak without restarting. The automatic cleanup approach described there works in the background while you play.
Definitely worth checking if your sessions degrade after an hour.