I wish all software products would do that. Chat applications are like a busy town square where everybody is yelling into the crowd and important information doesn't survive the moment, while a discussion forum will eventually grow into a public library which preserves information and makes it searchable (assuming that search engines have access to the information of course).
Oh certainly - I go ballistic whenever I see a Discord link for support or community
At the very least discord doesn't make threads which get lost in the channel like slack. But both suffer without tools like telegram which automatically catalogs all links, files, images, etc into tabs. But at the end of the day a chat system isn't meant to be documentation. It's meant to be chat. If you and me talk in the hallway, we wouldn't then tell a colleague oh yeah we figured it out in the hallway don't worry. We would try and document it somehow so that it's useful later.