Andreas Olofsson is the founder of Adapteva and the creator of the Epiphany architecture and Parallella open-source computing project. He has published his own analysis of the RISC-V ISA. Quoting the conclusion:
“The RISC-V architecture is not revolutionary, but it is an excellent general purpose architecture with solid design decisions. The true breakthrough here is really the open source licensing model and the maturity of the design as compared to most other open source hardware projects. I am personally very enthusiastic about the kinds of low cost systems that will be built around this RISC-V architecture going forward. A royalty free 64-bit RISC-V core would have a raw silicon cost of a couple of cents in current CMOS process nodes. Now that is exciting!”