I've always been fascinated by the ARM and PPC embedded support on FreeBSD, which reflects the real market and not some fantasy land. Which also explains the sad state of the POWER port right now.
I'm fairly certain that RISC-V will eat ARM and it already started on the bottom end with embedded chips being replaced with RISC-V. nVidia, storage (SSD, HDD) vendors already have RISC-V silicon deeply embedded, hidden in sight. I feel like it will be the FOSS "revolution" all over and more progress because there's no need to pay stupendous amounts of licensing fees to ARM Inc. One could have done this with OpenSPARC too, but for political reasons or technical limitations of the ISA, it never took off.
My prediction is that many embedded ARM chips will be replaced by RISC-V. It won't be free because someone has to create the desired chip IP, unless you're happy with the free ones, but there will be competition that doesn't involve a parent licensing agency grabbing all the money for an ISA they invented 30 years ago. Good times to be a compiler codegen developer :).
Anyway, they announced this publicly in 2016 so I assume it's already hidden in some nVidia hardware. I also read about a storage vendor (Seagate? or WD?) working on a transition to RISC-V, but I cannot find it right now.
https://riscv.org/wp-content/uploads/2016/07/Tue1100_Nvidia_...
The reasons cited sound like those we heard about Linux and Samba or Linux and Apache in the past.