The biggest problem is a lack of threading. I can often find questions matching mine, but the answers are impossible to search for because a lot of replies won't ever @ the question asker. So I'm left skimming an entire channel that includes 50 other things that I don't care about at the moment.

The sheer volume can be overwhelming too. I went on the Zenith (VR MMO) Discord the day after release to ask a question and I found it to be useless. The channel was moving so fast that 2 min after I asked my question I couldn't even find it and had to search for it. There's no way to follow something going that fast (at least for me) and a lot of the chatter is tangential, so in addition to being poorly organized the signal to noise ratio is low.

Sure, you can keyword search easily enough, but the information you might be looking for is sometimes scattered over dozens of channels.

Usually you won't know what server it will be in, and usually you'll be searching from google.