I don't agree with history telling us that at all. HDMI, MP3, MPEG, .docx, DirectX, CUDA, I'm sure there are more. History tells us that money wins.

But I also think this is an example of a slight disingenuity in RISC-V being referred to as open-source. It's borrowing the clout of open-source software projects where the end user has the freedom to compile them at home. I can't fabricate a CPU at home, I'm still beholden to whatever patents the manufacturer chooses to license. SiFive have a >billion dollar valuation, for a business based on selling licences.