This is not s replaceable event. So no addrs. But we will use nostr:nevent soon.

Not with this attitude, you won't. I'm just a Nostr pleb but a client (Damus) complains about events following a merged NIP and clealry states that they won't adhere to the agreed-upon standard. On an open protocol where clients are expected to "compete" for users. There's no way Damus devs can win this argument or this race for users and features.