Can also see the messages in Amethyst, for example.

So 0xchat is a specialized client mainly for DMs, but the metadata is still public (who is messaging whom and when).

So basically, if I do not switch to XChat, 0xchat (DMs in general) have these disadvantages from a privacy perspective?

I only remember from the early days of nostr to not use the DMs at all.

What is the current state? If I may ask.