You seem to be making the classic mistake of thinking that a given RISC-V processor is open source. The standard is open, the processor's source "code" (design) doesn't have to be.
This does not mean RISC-V use wouldn't be a good thing, as it prevents a whole boatload of legal issues, but it just isn't what a lot of people seem to think it is.
ARM could end up being a better ISA in the very high-clock high-IPC domain, it remains to be seen.
I accept that I should have been more careful in my wording. I intended to comment that having an open source ISA that you could create processors for is a huge step in creating competition.
If someone wants to compete with Intel they would have a hard time even if they make an excellent processor since they are unlikely to get a x86 license. With arm you have to pay licensing fee and control of the Isa is still with a private company.
With risc v you can make your own processor and have a good shot in market. You will also have a chance to have a to propose/comment on future ISA changes.
This does not mean RISC-V use wouldn't be a good thing, as it prevents a whole boatload of legal issues, but it just isn't what a lot of people seem to think it is.
ARM could end up being a better ISA in the very high-clock high-IPC domain, it remains to be seen.