> As I say, your comment seemed to imply it was possible,
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".
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".