NIP-4 Security Warning - why i use simplex and not #nostr dms

This standard does not go anywhere near what is considered the state-of-the-art in encrypted communication between peers, and it leaks metadata in the events, therefore it must not be used for anything you really need to keep secret, and only with relays that use AUTH to restrict who can fetch your 'kind:4' events.

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 ref image:
https://image.nostr.build/aa2b80de8401c4f13192c9bc7fc350bb83fd6724cc53c6a082e9a2d95113402b.jpg 

 Or use nip44 if available. 

 i've heard good things. hopefully it will be ready for widespread use soon

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 what about CipherChat, Sphinx Chat or Briar vs using SimpleX? How do these all compare? Drawbacks?