While reddit has a quite bad reputation, there are quite a few subbreddits which are heavily moderated and quite serious: For example, /r/askhistorians require

While reddit has a quite bad reputation, there are quite a few subbreddits which are heavily moderated and quite serious: For example, /r/askhistorians requires that all answers be long form and cite peer-reviewed articles (no wiki, first person comments or pop-historians allowed). Some of the tech subreddits there are much better than StackOverflow - for example, I get better answers on /r/rust than on SO.