This says it all:
AMD doesn't support it. They just pass it over to the community so if enough ppl take initiative, you might get progress in 5 yrs instead of 10.
OSS is a good concept and is an ideal but for wanting things to work, you read this a zillion times so it doesn't matter if you have a card or not. If you read this in every distro forum there is and why they pick the evil Nvidia card.... video and 3D are things a lot of people don't want to sacrifice for waiting for features.
I don't think this is FUD. Not sure why that is the accusation. If it was true OSS, then why take years to get anything working?