Another great example is Friendica.
While Pleroma have DMs made to be chats (like in Twitter) - Pixelfed too - Friendica just took "Private mentions" Mastodon's feature, and re-designed it in a similar way to chats, and re-named it to "Messages".
But for me, I think, would be better to implement DMs as chats, you know? Like on Twitter and Pleroma.
cc: @arunshah240 @Gargron
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