There used to be many excellent web development communities, but almost all of them have died more than 10 years ago. You can still find some good on topic conversation on IRC.

These communities died because experienced developers wanted to talk about product and emerging capabilities. People entering web development just wanted to just talk about frameworks and trends. The experienced people stopped contributing once everything becomes about tool literacy and conversations about framework literacy are boring to everyone so even the conversation killers would stop showing up once it’s apparent the scene is killed.