[jkrejcha]

Responding to the Discord point, charitably, I think the person you're replying to is saying that Discord is a poor documentation platform that has some fatal flaws, and I do think it has unfortunately replaced web forums in a lot of contexts, which means a couple things:

1. It's unsearchable and opaque: you can't really do anything but the most basic of searches on Discord and getting support or finding previous/similar questions can be incredibly difficult. This also has the strong disadvantage of being unarchivable with makes the next issue more important.

2. It's controlled by a single entity and the viability of Discord, from both a service provider perspective and a community perspective is uncertain. For all we know, Discord, the company, could die without any warning, or there could be policy decisions which make hosting communities untenable. If that happens, it'd be incredibly difficult to get stuff off of there. With more decentralized communities, or even centralized, but internet-visible ones, there are potentially archives and backups that can help restore information.

This, imo, makes it not a great choice for a software project's forum or whatever. Maybe general IRC-style chat where conversations tend to be relatively ephemeral anyway? Sure. But it's not a great forum or wiki replacement imo.