Discord could be a decent place for technical support, the way irc used to be used, but unless it’s super active with knowledgeable, helpful people, forums/GitHub discussions and other asynchronous comms channels make way more sense.
Otherwise it’s like shouting into the void and the signal to noise ratio on my discord channels is really low.
Plus with forums and discussion boards they can be stickied and indexed to be searched. So the next time someone has that error message they can pull up that exact discussion.