I don’t think you know what centralization/decentralization means.
On matrix, you scan spin up a server/instance and communicate with any other matrix server/instance. On Fluxer, if you self-host, and your friend also self-hosts, your instance/server cannot communicate with your friend’s instance/server. You would have to create an account on your friend’s instance/server and vice-versa. You would also, probably, have to be running two clients in order to chat in both servers/instances.
What?
I don’t think you know what centralization/decentralization means.
On matrix, you scan spin up a server/instance and communicate with any other matrix server/instance. On Fluxer, if you self-host, and your friend also self-hosts, your instance/server cannot communicate with your friend’s instance/server. You would have to create an account on your friend’s instance/server and vice-versa. You would also, probably, have to be running two clients in order to chat in both servers/instances.