It's more than open source. A political party I tried to join organized via Discord. A hardware project offered support only through Discord. Seems most "communities" have one now. But I hate Discord and it's a poor tool for those jobs! A subreddit might have been better as I wouldn't need an account to view proir posts for troubleshooting, or organizing meetings.

Or an email address.

Or a contact form.

But no, only the aptly named Discord.