Earlier quoted context omitted.
> But does it really do so in practice? If I'm using Element/Matrix and a colleague is using WhatsApp, or Signal, or Telegram, or Briar. Can they reliably send me messages? Can I reliably send them messages? Matrix is not the provider. Matrix is the protocol/idea. Element is both an app and a service. What is common, reliable, and achievable in practice: I decide I no longer like New Vector (who run the matrix.org ho…
But you're still only talking about apps that run on top of Matrix ... your initial comment made it sound like it was possible to interact with people on WhatsApp, Signal, Telegram, etc. I know that Matrix isn't the provider, that's why I mentioned Element/Matrix. I know that you can communicate between services that are all running on top of Matrix. That's why I specifically asked about other services. As I say, you…
After re-reading my comment, I can see how one would think that. I apologize for the confusion. I was actually trying to draw a distinction be between messaging systems that are provider agnostic and those that aren't. SMS and Matrix both allow multiple competing providers to interoperate. WhatsApp does not. That is why, I believe that we must not consider Whatsapp "critical infrastructure". No one company should be "critical".