I have been running my own server for a few years now. I would describe it more as an alternative for What's App or Signal than an alternative to discord. I think it's more used in a professional/and or government setting for organisations who need to run their own services.
Also, Matrix is just the protocol behind it and there are quite a few different clients for it, the most popular one is element. Lemmy.world also has a link to their Matrix instance.
Why? There are various arguments as to why the old audio jack standard is obsolete, but this discussion was essentially settled with the Fairphone 4, which was the first one that did not have a headphone jack. And they released a detailed article describing their reasoning..
https://support.fairphone.com/hc/en-us/articles/9836188988049-Audio-jack-3-5mm
The community? It's not as if Fairphone just willy nilly decided to get rid of the headphone jack, this was done with feedback from the community in mind.. Just because you are loud and passionate doesn't mean that your opinion is the only one that represents the community's.. As a fairphone user and "member of the community", I say fuck the 3.5 mm jack.. It's an ancient standard that was obsolete years ago,
And just to be clear, this isn't a discussion about wireless vs wired earbuds. You can have wired USB earbuds, you can even use your old 3.5 mm jack headphones with an adaptor. This is a discussion whether we should switch back to an ancient and inferior standard just because you are used to it..
And this entitled and wilfully ignorant attitude will make people take you even less seriously.. You can't "just add the headphone jack", decisions like that have an impact on all of the design of the device and have to be carefully evaluated.. You simply going "come on just do it, how hard can it be" will not convince anyone..