I've listen to nostr:nprofile1qqsr9cvzwc652r4m83d86ykplrnm9dg5gwdvzzn8ameanlvut35wy3gpz3mhxw309aex2mrp0yhx5c34x5hxxmmd9uqsuamnwvaz7tmwdaejumr0dshszythwden5te0dehhxarj9ekxzmny9u0ljp2l more or less implying that all clients and apps could be relays too (if I got it we'll ) in order to increase decentralization and censorship resistance.
Maybe some relays features running locally on the device without the user even being aware of it, could be cool.