I understand the reasoning for using Discord/Twitter, but wouldn't it also be beneficial to have Mastodon/Matrix channels alongside, given the "minimal/small tech" style feeling of the page?
Why isn't Discord just enough? Or just IRC? Honestly I think this fragmentation that gets suggested is why a lot of projects fail; never stand the test of time: they try to be everything to everyone.
They can without fragmenting.
Just combine a Matrix-Discord and a Matrix-IRC Bridge