I definitely agree about the forums being better in terms of help. Though the search function in the forums could definitely be improved. Often I use Google to search the C3 forums. 😅
Just like you mentioned, the forums are an archive, and everything in Discord is basically temporary which seems like dang shame to me, because so much knowledge and help is being shared and given there.
Honestly I'm not much of a fan of Discord because the whole program looks like a circus with all the busyness, icons, flashing things, messages, different channels sounds etc. so it can be confusing.
Here, the forums are divided into topic with messages. Clear and simple. Discord is basically a chat program and when it's really busy on a channel, your message or question won't get any visibility.
Enough of my Discord rant though.
I suppose Reddit is also like a forum, except with the huge drawback that new replies in topics don't bump the topic. It will be buried forever, slowly but surely, regardless of the amount of replies it's getting.
So you basically get 'one chance' and you need to be lucky that someone will find your topic. I also don't like the new layout, I don't understand why they put so much white space around everything.
Forums ftw.