But in essence putting stuff like this in the kernel is putting pressure on freezing the extension. However it's a bit of a chicken and egg situation, you need

But in essence putting stuff like this in the kernel is putting pressure on freezing the extension. However it's a bit of a chicken and egg situation, you need serious testing before you can ratify and freeze but if you don't encourage people to code against the (moving) spec you wont get the testing you need. As a CPU designer it's particularly tough, wanting those changes frozen asap so you can implement them, but not wanting a broken one