Thanks, I've tried a handful of game dev. discords. They are not designed to collect and organize information though, and keeping up with chats is a huge chore.
/r/truegamedev is supposed to be a better version of /r/gamedev, that might be one option. I keep a list of programming and gamedev subreddits in RES. There's a lot of noise but that seems to be where the conversation is.
Also Twitter. Just about every game developer, from AAA to indie, in every discipline has a Twitter account, and a surprising amount of technical discussion goes on there.