@coolboymew @lanodan I think the problem comes down to social things; Discord users can't migrate away because no one else will, so they'll be the only one on, say, Matrix. GitHub users can't migrate away because would-be contributors, or even those just wanting to report an issue, would have to migrate as well and create yet another account.
While in some cases it'd be more convenient to set up an IRC channel and pre-configure a Kiwi IRC instance, it for some reason doesn't matter to everyone.
And no one wants to work around these issues by bridging, creating an email system, a web app, so on. The few who do are the technologically savvy ones.