It’s very important to call out this dude either doesn’t understand what a community is or comes from this new generation that thinks docs should be on Discord and not easily accessible.

Functionality: can it do everything required of a platform for building, organizing, and sustaining a community?

Somehow Discord gets a 4 there. A chat server is a community of a kind but it will never rise the level of a platform’s community because it is, by definition, somewhat ephemeral and just a bunch of chat logs. There’s a big difference for example between IRC and bash.org for things like AzureDiamond.