If the processor adds more functionality, it should get more instruction, that's why it is extendable. However there is no reason to add specialized instruction

If the processor adds more functionality, it should get more instruction, that's why it is extendable. However there is no reason to add specialized instructions for things that can be expressed at a lower level, and that would be CISC. The data and test already done by clearly show that the core premise of the advantages of risc is true. The chips are less complex because of the feature set and use less area and less power.