Comment by LexiMax

Platforms like Discord give their moderators much more power and discretion, while removing mechanisms for users for protest them. Despite this, Discord largely succeeds in facilitating social spaces for its users.

The biggest reason why this works is that even though users have fewer recourses against power-tripping mods, it also takes away the moderator's leverage of being the tastemakers of content aggregation that Reddit/HN/Slashdot mods and power users have. Without content aggregation, it's a lot easier for social circles to cleanly split if there are disagreements.

I also think that the fact that Discord servers are opaque works to its benefit. The openness of Reddit leads to a lot of cross-subreddit co-mingling, which invariably leads to drama and conflict. There's a lot less of this happening on Discord - it's not zero, but it's to the extent that posting discord conversations outside of their servers is widely considered "leaking" and Discord actively uses legal avenues to go after dragnet-style log archives.