[quadrangle]

For clarity, Element is merely a client (the main one) for Matrix.org. What matters is whether people are on Matrix rather than whether they use the Element client. But most Matrix users surely do use Element.

[btdmaster]

matrix.org is just one instance, it is very important that people choose different instances so that interoperability is kept.

[feanaro]

I think the poster was referring to the protocol instead of the instance.

[pooper]

Maybe this was a case of user error but I know I was not the only person who had difficulty joining Mozilla's riot with their existing riot username when Mozilla first opened their server.