Correct me if im wrong. If I post my content to 1 or 10 relays, and for reasons, let’s say all these relays decided to shutdown after a year. Is all my content lost forever? nostr:note1k28lw5htknk8clmqtar5gzr9v3wzufpk2e8crq84yt29zcpwa80q4f00qm
Discussion
Depends.
Because there are chances that someone broadcasted your note or re-posted it to their relays which maybe different from yours & there are some relays like nostr.band (also wine relay i think) that aggregate from others, which may have your note.
But the only way to guarantee that you have your note is to run your own relay & publish your notes to it.