Whether or not XMPP is a Signal or a Discord replacement is dependant on the client.
For a Discord replacement, there is the Movim XMPP client, which has group audio/video calls, screensharing (w/audio using chromium based browser), support for gifs and videos within the chat, and very soon Discord-like servers with rooms, after which the dev plans to work on drop-in voice chat rooms.
Whether or not XMPP is a Signal or a Discord replacement is dependant on the client.
For a Discord replacement, there is the Movim XMPP client, which has group audio/video calls, screensharing (w/audio using chromium based browser), support for gifs and videos within the chat, and very soon Discord-like servers with rooms, after which the dev plans to work on drop-in voice chat rooms.