What is justin using for streaming these days? Wowza? Something they built themselves (I know they used a custom built python solution initially, but they move

What is justin using for streaming these days? Wowza? Something they built themselves (I know they used a custom built python solution initially, but they moved to something else along the way). Are they using ffmpeg to transcode the high bitrate game streams to the lower bitrate streams for viewers with slower connections? It's been a long time since that high scalability article came out.