To me, the problem is not iCloud being opaque, but that it's been unreliable at best, and a migraine-causing frustration at times. For example, some years ago w

To me, the problem is not iCloud being opaque, but that it's been unreliable at best, and a migraine-causing frustration at times. For example, some years ago when Apple rolled out syncing bookmarks across your macs and iDevices, I managed to completely destroy how my bookmarks were organized on both the source (mac) and the destination (ipad). iCloud in its infinite wisdom decided that it didn't like the way I had organized bookmarks into folders and subfolders, and tossed everything up to the top level. Syncing documents across pages or keynote across my mac and ipad were about as bad as the article described. It would take multiple refreshes and delays before synchronization would happen.