For me, the problem is not discords real time chat functionality (e.g. like IRC).It’s that communities are using it as their only source of information and getting rid of wiki pages and support forums.

There are many open source projects and communities whose documentation lives entirely in Discord. This makes finding information much harder as search engines don’t have the information indexed so you resort to asking on chat and hoping someone replies or using Discord’s horrible search functionality (it’s very basic and has a poor UI)