You can actually make forums inside of channels now if you are a community discord. But search is still shit lol

People who use discord don't want to use it like a forum. They want instant interaction.

If you think about it a lot of forum banter is just that, just because it's slower and persistent doesn't guarantee a higher signal to noise ratio.

If Discord were to add wikis so people can add persistent FAQs and guides it would cover 99% of its user needs.