nostr:npub1x0r5gflnk2mn6h3c70nvnywpy2j46gzqwg6k7uw6fxswyz0md9qqnhshtn nostr:npub1znavx0efn9y7a9tjux6pchjdurmw2e84fxwxflmauupjz0558x0sqmwtpl Without a standard for how long messages "should" be retained, it's up to the individual relays and clients to decide, and that's a recipe for thread/message decay over time.