It also sharpened your writing and thinking. By responding to questions you solidified your understanding of topics.
It got a lot of hate for the moderation but I think that was mainly in huge communities where literally “dumb” questions got bombarded every minute. Smaller tech like Docker when it first arrived on the scene had communities that learned together.
Spent a lot of time there when I was a few years out of school and still trying to figure out what it meant to be a software eng. It’s sad to see it become a ghost town and I think it’s a net negative for young engineers to have an all knowing entity spit out every answer.