There's one thing about this I don't see brought up - if someone says "add me, I'm janitor#0832" people usually know they're talking about Discord since that format is ubiquitous, and that's a very valuable thing. They're destroying that and moving for something like "add me, @janitor0832" - which then needs to be qualified (Twitter? Instagram?). Bing tried so hard to become a verb and Discord is discarding something they already have that's similar