ASTC texture compression requires a huge amount of silicon area on die. There need to be several of those on a GPU. In addition there are licensing and busines

ASTC texture compression requires a huge amount of silicon area on die. There need to be several of those on a GPU. In addition there are licensing and business issues that made Microsoft mandate BCx for DirectX and Google mandate ASTC for Android. And having both blocks on a GPU would need way too much area.