I have several realms and if I need to sync more than one I will do Sync All, but I noticed that when I do Sync All it take a very long time compared to syncing them individually. Does the program not have the ability to do a quick scan and realize that a realm is up to date and doesn't need to be synced? We have a Sync Status that shows if a realm needs synced so I would think those would be the only ones flagged to sync when you do Sync All.