>I am not sure what exactly makes Discord so attractive. Let's for the sake of the argument say it is a low-latency noise cancellation technology.

Discord is not popular because the technology is advanced. It got popular earlier on because the UIs for alternatives were garbage and they nailed the ease of multiple servers/channels/etc.

The entire point is that discord could be easily reproduced from a software perspective. That won’t matter thought because the users won’t be on the new network and will have no incentive to switch.