Does it need some kind of special relay feature other than allowing these kinds?
I am now a big fan of 1059 event (Vitor version nostr:npub1gcxzte5zlkncx26j68ez60fzkvtkm9e0vrwdcvsjakxf9mu9qewqlfnj5z )and #0xchat app also makes extensive use of 1059 event: sealed DM, secret DM & voice and video call signaling events.
In the upcoming version, it will continue to be used, with private group featured next.
Perhaps we do need to find a relay that can perfectly support the 1059 event requirements.
Discussion
I’m not quite sure, but I think so. For example, the original ‘kind’ characteristic can be represented by ‘k’; The ‘p’ tagged pubkeys can delete the event