iCloud lost all my Photos folders and albums
I had dozens of organized folders and photos albums in Photos which I organized on my Mac.
These stopped syncing to my iPhone so I disabled iCloud on the phone and re-enabled it in order to re-sync it.
After several days suddenly all my albums I previously created have disappeared from iCloud (and also from Photos on my Mac).
I assume iCloud things my empty iPhone has the latest updates and is removing all my albums from iCloud. Is there really no way to restore these folders and albums using iCloud? e.g. 'revert iCloud photos to the state from a day ago'?
If the answer is 'start using Timemachine to backup' then iCloud is only a (not very reliable) convenient syncing service but not a backup solution.