Dmitry Grinberg published a long piece explaining his distaste for RISC-V, you can read his article here: RISC-V: They Should Have Known Better - Dmitry.GR. It went to the front page of Hacker News and it started a good argument on Lobsters. It is the most substantial criticism the architecture has had in a while and though I switched my entire stack away from STM32 and ARM to RISC-V and did a video on it about a year ago Goodbye STM32 ARM – Meet the CH32 RISC-V Chips That Replaced It! , part of me is infuriated because so much of what he said seems like a biased perspective.