Anything that uses the words “liberty,” “lemmy hive mind,” and “pedophile” in the same article cannot be taken too seriously.

There are many things I don't understand, but if you don't make me read the full article I'll concur that simplex is amazing.

TL;DR they switched to simplex because matrix leaks metadata and other flaws. Also simplex's clients have been shockingly stable.

Those matrix leaks are so weird

Does xmpp / snikket / jabber suffer from these same sorts of problems?

"Matrix" is a pretty difficult-to-search name. What is it? Federated IRC?