I think as the ecosystem evolves, relay discovery and relay based moderation tools will be needed to help decentralization and help for content. A permisionless Wikipedia is nice, but users likely would want curated mini-wikis either by topic or to incentivize quality (paid relays or social-trust based inclusivity) and keep a high signal information landscape.
Great podcast with nostr:npub1jlrs53pkdfjnts29kveljul2sm0actt6n8dxrrzqcersttvcuv3qdjynqn and nostr:npub1kuy0wwf0tzzqvgfv8zpw0vaupkds3430jhapwrgfjyn7ecnhpe0qj9kdj8 touching upon specialty relays.