The chads at nostr:npub1mutnyacc9uc4t5mmxvpprwsauj5p2qxq95v4a9j0jxl8wnkfvuyque23vg stood up a Primal caching service instance and built some cool Nostr features that would be really hard to do via relays directly. Take a look: 

nostr:note1yqhh95wen75zlutxqqg6ytexnd46dkr4slxpy9ffnth7ynf0sxzq3fj5vg