RISC-V is doing great in microcontrollers. From 10 cent Cortex-M0 competitors by WCH etc, to dual core WiFi/BLE enabled devices by Espressif etc, competing with Cortex M33. On Embedded Linux class devices the ARM Cortex Axx reign supreme, until one hits X86 industrial PC territory. I think these trends will continue, but RISC-V will likely get stronger in all of these as time goes on.