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?

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.