I just searched for “Matrix stack” but I’m none-the-wiser, what is it?
Right, you don’t run the thing yourself at a program level, but you can create and moderate channels as you wish, which is what most people want. Sounds like the Windows v Linux argument, just because a lot of people prefer something doesn’t mean we have to shit on it. Discord seems to work well with lots of integration (including on consoles) and fulfils its purpose pretty well from what I can tell.