They are in a lot of current Western Digital SSDs. Nvidia is known to have them in their GPUs in some form. I know of other consumer products where they are similarly used as embedded CPU, which is where RISC-V will be most prevalent in the coming years.
Western Digital is heavily involved in RISC-V, but I wasn't aware that they had confirmed any of their products are using RISC-V yet. Last I heard from them, their first generation of in-house NVMe SSD controllers were definitively not using RISC-V. And their second generation of NVMe SSD controllers is only just starting to ship.
