This is the answer.

For whatever complaints one might have about Discord (and they are legion), it does a really good job of packing a bunch of different functionality in one place and with a UI that’s super easy to grasp and understand what does what and how that requires very little foreknowledge of what the thing is or its underlying mechanisms.

If I am completely new and pretty blank of what it is, Discord’s pretty good at me being able to catch up quickly; it’s got a good UI and, following that, functionality for a bunch of things related to communication. And, if I need a quick solution that just gets me going…that’s gonna be pretty painless.