Europe’s sweeping rules for tech giants are about to kick in. Here’s how they work
(english.elpais.com)
Use any messaging app and choose to make it default.
Make core messaging functionality interoperable. They lay out concrete examples like file transfer.
I've read some things like this. Is it correct that messaging services will need to interoperate? WhatsApp, Messenger, iMessage? Would love to be able to message people that I can't easily reach now from Signal for instance.