As long as you don't get too excited about calling 'private' mode private cause it's just nip42 auth. This is not a telegram replacement.. only because nostr is designed to be censorship resistant. So you can clone a 'private' group just by joining it, And instead of screenshots you can just blast these events around as fully verified proofs..

So I don't see how it's much different from using a relay to air reply in global, other than it requires a whole new implementation of a smart relay.

That being said, I'm not really opposed to it, I could probably implement the spec for it for strfry proxy if someone gives me a reason.

The timeline thing says it's a hack to prevent notes out of context, but I hardly think that's all people use telegram for ..? Like, my post was within the last 50 posts, is that really that valuable?