I do think their point about not using E2EE enabling better moderation is worth considering, because it’s absolutely true that the server being unable to filter malicious content makes moderation harder. Still, imo any decent chat client should support it as an option, because if I’m talking to friends I don’t want any servers having access for any reason. Large guilds for public info, like the KDE matrix for example, shouldn’t be E2E encrypted for this exact reason (iirc it’s not, because matrix allows the choice and KDE has chosen correctly). Lack of encryption doesn’t mean all moderation issues are solved, though, cuz that same unencrypted KDE matrix had a pretty major problem with CSAM being spammed a while back.

So IMO the ability to disable E2EE is valuable for a discord replacement, but the author’s idea that E2EE shouldn’t be implemented… does not follow.