[troupo]

> That depends on your definition of decentralization.

Decentralization literally means "not centralized". If you have a single centralized entity serving all your messages through a set of centralized servers, it makes the setup what?

> Because of the way most people set up their apps, almost all Matrix users and ~all Signal users are using a centralized app under this definition.

Yes, they do, and it's centralized. What exactly makes you think otherwise?