With ARMv8, a lot of companies have this kind of license. I think there are six independent ARMv8 implementations that I'm aware of, but there may be more. Well, I say independent - they all had engineers from ARM consult on the design, but they're quite different in pipeline structure. This is the problem Intel is going to face over the next few years. They could compete with AMD by outspending them on R&D: Intel could afford to design 10 processors and only bring 3 to market depending on what customers wanted, AMD couldn't afford to throw away that much investment. This is how the Pentium M happened: they rushed to market one of their back-burner designs. Now, however, they're competing with half a dozen companies all of whom have ISA-compatible chips and all of whom are content to heavily optimise their designs for a particular market segment.