Sure, but you probably need less than 100% support to find things very usable for everyday applications. An asymptote isn't so asymptotic if you don't need it to intercept the origin. :)
But when this test suite hits 100%, then comes the optimization work. Just getting it working is still far from getting all the performance out of the hardware.
I would assume the last 10% is going to be just as hard as the first 90%, just like most engineering projects.