Right now, I want a secure laptop. I can't by one (nothing which doesn't require binary-blobs), so I decide to make my own.
What do I need?
1. An instruction set. 2. A factory. 3. Customers (and a lot, so power of scale can make it somewhat reasonably priced).
All RISC-V could help with is #1. I won't have to contract from ARM and will save some cash there.
But I'll still need to build a factory and deal with economy of scale.
Moreover, what will prevent companies from leaching off RISC-V and patenting improvements. As I understand, there are so few foundries right now that that can easily cross license patents from each other and prevent upstarts from breaking in (so you'll have a situation where the industry leaders end up organizing themselves into something which looks like ARM or Intel/AMD)?