I have created an additional topic that is tagged as „bug“ for the stuck at „Checking for Updates“ problem on XBox. It contains a description of my latest experiments. At least on my XBox Series X the limit is 446 packages (parts of add-ons, 228 add-ons in my case). If I go beyond that, the update check at startup gets stuck. Is there anybody on XBox who has it working with more than 446 packages in SU12? If so, could it be a problem on (some) of the servers?