Gotcha, so in summary, anything that relies on an internet service, such as Signal, Matrix, or Simplex, is vulnerable to government ordered blocks via black list that ISPs are compelled to enforce. Am I thinking of this right?

Out of curiosity, is there anything stopping you from suggesting SimpleX? How does SimpleX compare to XMPP or Matrix?

Are there any other messaging options that are more resistant to government ordered shutdowns than Matrix?

Interesting—I feel like I see Matrix touted as more private than Signal b/c of Signal’s phone number requirement. What compromising metadata does Matrix require that Signal does not?