I can more or less easily get my data out of github (I can host a repo elsewhere, write a script to scrape the issues, etc.) I don't like using the non-git parts of it for much (ie why write a wiki when you can just make a repo full of markdown files?) Discord is a whole other level of walled garden. It's a black hole of information, and that information isn't owned by you. Discoverability is nonexistent.