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WhatsApp interoperability with Signal
(lemmy.world)
This is a most excellent place for technology news and articles.
Federating would mean handing off chat metadata to Meta and other for-profit companies in the future.
I don't see how anyone excited to use Signal would like that. It very much defeats the purpose of using Signal.
This is not federation, this is signal being able to send message to a WhatsApp server and WhatsApp being able to interpret it to send it to a WhatsApp user. WhatsApp wouldn't know more than what it already knows when you inevitably need to use the app to reply to your grandma or whatever.
A big plus however is that you can convince friends and family to switch since they would be able to keep chatting with their family and friends, so the entry barrier lowers by a ton.
This is not federation and it is great.