Many clients are really close.

Honoring and showing edits is a must have feature.

Links need to be encased in something like markdown.  I know fiatjaf hates markdown...but oh well.

¯\_ (ツ) _/¯ 

Amethyst does these things.

Rendering long form notes directly inside the app. Once again, Amethyst does this.

Honoring Nostr link standards,  you know, things like nostr:nevent or nostr:naddr etc..