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@mkljczk@Tutanota I think in this concept it would be better to compare XMPP as protocol, because there is a large number of servers, clients and services.
Ofc they can add * with information that "depends on implementation", and add popular one.
@andyy@Tutanota@mkljczk I wasn't even responding to you I meant that both XMPP and Matrix are not services providers, so I agreed with you that both could be added to the image I wasn't making a point about XMPP vs Matrix