> What you mean to say is that you do not personally understand the myriad uses where it makes an order of magnitude difference in performance You clearly misu

> What you mean to say is that you do not personally understand the myriad uses where it makes an order of magnitude difference in performance You clearly misunderstand the concept of a modular ISA. RISC-V does not only target high performance. It targets simple scalar microcontrollers, general purpose superscalar machines, and specialized acceleration (Except specific encoding like VLIW for now). Each of these domains needs a slightly different ISA, and a modular ISA like RISC-V can aggregate all this by providing several ISA extensions. Then, for each domain, we must select an appropriate set of extensions. And bitmanip is not necessary for all domains.