[hajile]

We've moved past this for the most part. Anything running on an ARM will be almost entirely written in C. At that point, porting to RISC-V becomes much cheaper. As long as the savings from RISC-V exceed the cost of porting the firmware, this is what companies would do.

[thetallstick]

The code may have been written in C but many drivers are distributed in binary only form with headers. Unfortunately the binaries are often ARM only.