Which is great, but still does nothing for off-site storage.
You always have at least one off site backup of anything important. For most people, that’s going to be some kind of cloud service. What you use to access that can vary a good bit (as someone reminded me, nextcloud services you can use rather than have it all be on site exist), but syncthing would require that you have someone else willing to have a device at their house, always connected, for it to be a viable pick this that aspect.
Don’t get me wrong, syncthing is awesome, but it isn’t a total solution by itself. Hell, my redundant off site backup is less hassle, tbh. I just swap out external drives when I visit my best friend. I take the most updated one, leave it and bring home the previous one from his place. It’s always a little behind, but it isn’t reliant on connectivity lol.
That’s what I was getting at. If all of your backups are at the same place, physically, you don’t actually have backups, you just have redundant copies. A backup that can be destroyed at the same time as other backups or the original isn’t really a backup at all. It’s good enough for a drive dying, but not for bigger events.
That’s what I was getting at, I just forgot that nexcloud services exist.