Can our photos be lost?

A professional photographer does everything he can to keep the chances of this to a minimum. On the wedding day, I work with several professional cameras that also write to 2 memory cards simultaneously. And when I get home, I immediately copy the images to several different repositories, upload a backup to the cloud, and store the data on multiple servers, geo-redundantly. And I will definitely keep and archive the pictures for a minimum of 3 years, so if they are accidentally lost or not found, feel free to ask me!