That's it. The article could be just that. You log back in and all your messages are there without you having to provide a secret or allow access to some specific backup? Your data just lives on the server. The only thing preventing anyone from accessing it is the goodwill of the people running the server.
Not true. Secret chats only live on a device where you started it. Regular people may not use them (their problem), but these are common for business-critical chats in my circles.
