@Forester1 >>> Well, Discord is popular for good reason, especially as a platform for collaboration. That's why it has seen widespread adoption by learning institutions with the majority if users in higher education, some in High School and very few in Junior or Grade schools (high distraction rate, due to young age of students).
I have been using it as a collaboration platform with creators in Cities Skylines, and CS:2. For example: Say you have a group of 4 creators working together on a modeling project. Using Discord allows for real-tine streaming of work, and idea exchange.
Any of the four team members can present images, audio and video, of works in progress, or ask for opinions on a new design aspect, all in real-time. Say for example, I am working on a building model, and I want to show progress to the other team members.
I can do this in several different ways. Live stream to the server channel, with the others watching me demonstrate in my modeling app, or from any other app I may be using. I can run multiple streams as well, allowing for easy and fast idea exchange.
I can record and upload video and audio clips, images, models, textures, CDP's you name it.
Video and audio links can be shared/viewed together. Files can be uploaded/downloaded.
When I was in the Central Europe MP project. Discord was our Collab app. One could very easily jump in/out of the app/Group Channel and share whatever new information one had, or we could run live route test ops for debugging or new track testing.
Back to Cities: Skylines. The modding community use Discord for collaboration. WIP versions of game mods can be shared/tested/reviewed very easily, with group feed back instantaneous. One can type info, conversations etc. There is live voice comms and audio streaming.
It's a great platform for these reasons, with the quality of media exchange formats, codecs ect at a very high level.
I love it !