In my world the biggest advantage of Discord is the Availability on consoles allowing voice chat for crossplay. For all I know none of the alternatives you mentioned is available for consoles. I know there are people connecting their PS/XBox audio output with a computer running TeamSpeak to receive VoiceChat and in Game Sound from the same system but this is not a usable solution for most people.
In my world the biggest advantage of Discord is the Availability on consoles allowing voice chat for crossplay. For all I know none of the alternatives you mentioned is available for consoles. I know there are people connecting their PS/XBox audio output with a computer running TeamSpeak to receive VoiceChat and in Game Sound from the same system but this is not a usable solution for most people.
100 % agree. Somehow Discord found its niche and no one else challenged it.
Edit: Xfire might have, but they died a long time ago