I think StackOverflow/StackExchange has served their purpose, and are now rightfully in a decline.
There are some niches sites in the network like bicycling, English, Mathematica, Academia, etc. They contain extremely high quality answers. But for programming, it's nowadays much more easier on GitHub and relevant issue trackers. I think it's good, because there are many questions in those sites that contain often outdated answers. Some lucky questions get a comment there saying the answer is outdated, but there are many outdated answers.
Perhaps, JavaScript has a lot to do with this. JS evolves at a much faster rate than sites like StackOverflow can keep up.
There are some niches sites in the network like bicycling, English, Mathematica, Academia, etc. They contain extremely high quality answers. But for programming, it's nowadays much more easier on GitHub and relevant issue trackers. I think it's good, because there are many questions in those sites that contain often outdated answers. Some lucky questions get a comment there saying the answer is outdated, but there are many outdated answers.
Perhaps, JavaScript has a lot to do with this. JS evolves at a much faster rate than sites like StackOverflow can keep up.