I was reading a heated and annoying discussion that there is no point to link to, and it didn't even come up with an answer anyway. But here was the point:
What does RISC-V offer over the other unrestricted (?) and royalty-free (?) ISA specifications mips, sparc and power?
I'm guessing the answer has something to do with complexity, orthogonality, extensibility and modularity?
Maybe also the network effect of the hype, that it's good because people think it is good, and therefore there is an up-to-date ecosystem of software and hardware?
Is there a patent situation around the others? I remember hearing that the Loongson implementation of MIPS skipped an instruction or two due to that, or some addressing mode. I think I also remember reading that those patents have now expired. Has something really happened on the MIPS ISA front this side of the millennium?