The problem is not everyone can or wants to use Discord or things like that.
I essentially quit Discord because it's too fast for me, isn't usable as an image storage anymore (leaving me with... this site alone because Imgur needs an account now and I'm not doing that), and is just annoying in general for me (I'm probably going to hop on once I get started on something for Sky, but only to post those things on that server), and I'm not touching the majority of social media with a 50 kilometer pole, limiting me to other communities (pet sites, mainly) and E-Mail (which, considering I only have one address, may become awkward once I finally develop a habit of checking my inbox often).