It's all in the client. There's not 1 Nostr, it's a protocol like the English language. Imagine deriving your opinion of English, just by listening to nostr:nprofile1qqsvktfat6k5ttdvjraszzhcqk9ya5ee3yfr7gmnk5qzq0c4ygz4j8qpr3mhxue69uhkummnw3ezucnfw33k76twv4ezuum0vd5kzmqpz3mhxue69uhhyetvv9ujumn0wd...