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@lemmy.ml 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.
What is wrong with Discord (Richard Stallman)
Spyware level: Extremely High (Spyware Watchdog)
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.
I imagine a world beyond proprietary software, and GNU/Linux is the most promising implementation of that.
I don’t agree with reducing software-freedom to an issue of mere privacy-friendliness. I’m willing to be realistic about the security shortcomings of Libre software but not if the alternative is locked down silos and walled gardens.