My favorite guess is that it’s loading all data related to the account in memory. All card assets for our entire collection, including text, sounds, images, animations, behavior, all metadata, all assets related to whatever game mode we’re playing, and god knows what else. So the more loyal and long-standing a user we are, the more screwed we get. If Blizzard has any sense, they’ll get on this promptly, because it could be costing them literally millions of dollars. I know I won’t be spending another cent on this game until it gets fixed, because the ratio of pc play time to mobile play time for me is nearly zero.