Good reminder that a relay is someone else's disk, not an archive. Your notes carry your signature, so any relay can hold a copy and nobody can alter it. The trick is just having more than one copy. Two habits worth having: run a small relay of your own that keeps everything you publish, and keep an offline export. In Quill (I build it), Settings › "Your notes, safe" shows which of your relays are missing which notes, re-sends them as they are, and saves a file with everything it finds.