Nordic has joined an industry consortium to promote the adoption of an open-source chip architecture called RISC-V. This move might raise questions about Nordic’s relationship with Arm, as Arm has been used in Nordic’s products since 2012. However, Nordic sees RISC-V as a complementary alternative to Arm, especially in power consumption-critical mobile and IoT applications. RISC-V allows users to develop customized hardware for extreme low power consumption, similar to how a proprietary wireless protocol can be optimized for power consumption. RISC-V will provide customers with more options and encourage innovation in the IoT market without conflicting with Nordic’s use of Arm cores.
https://blog.nordicsemi.com/getconnected/why-nordic-is-getting-involved-in-risc-v