For anyone that might need to hear it. I just installed the flatpak, and when linking it to my Molly app, I saw on the app the option to sync all message history. This is what always bugged me on the desktop client. Seems they finally went ahead to enable this feature.
Well, as for many topics, also “privacy” in detail seems to be very different to many people. Personally I like the “auto-expire” feature in every messager app. But I also know people, who get angry about deleted chats. Because they forgot, what’s been said in the past or they want to look up stuff months ago, or … I else don’t know.