kammerer I tried a post on the amd-gfx mailing list in the start of 2018 and no one responded.
As for Reddit: I feel that Reddit as a platform is going downhill because in part of the influx of "new users" compared to 5 or so years ago, and the fact that Reddit is more "corporate" with advertisements and other negative tactics to make money for the company. I mean look at the controversy with regards to the "redesign". People aren't happy.
In addition I think fragmentation of the userbase across multiple forums isn't a good idea, seeing how we have enough trouble organizing information here already.
What I think should happen (potentially) is that Slacor (owner of this site) should work on SEO (as much as I loathe that term) to ensure the forum ranks higher in search results for relevant keywords. I've already done my own searches and it already ranks highly with links to specific threads for specific keywords.