Like @Adabiviak said, the old forums just don’t work anymore. You can’t search, old links don’t work, and so on. The site worked fine for a few months after the move, even though you couldn’t post anything new. I think that functionality should be restored.
I can’t speak for all of the gaming forums, but the Brothers in Arms posts were a priceless trove of stories, personal accounts from WWII veterans, and a wealth of modding tools: code from Botman, tutorials, countless new gameplay ideas… all still relevant because we are still modding these awesome games!