You’re being heavily downvoted because this instance is “a community of free software and privacy enthusiasts” as the title on the front page suggests, and this in particular is the !opensource community. Discord is the complete antithesis of this, as it is a proprietary application locked to a centralized server that also spies on its users.
That being said, there are modern alternatives to IRC, such as Matrix, XMPP, Zulip, Mattermost, or RocketChat. However, I think IRC is fairly good at what it does.