All modern CPU's are RISC ( fight me I dare you ). The folks pushing for simpler designs are few and far between and aren't going to win. Any form of predicting/prefetch has a possibility in some way to be abused , so unless you want 486 era compute performance its kind of boiling the ocean. Also fundamentally disagree with your position about performance, Scalar integer performance is still king by a long way for CPU's. CPU extensions even AVX-512 are nothing compared to VLIW/SIMT based DSP's/GPU's etc in terms of pushing specialist based performance. Hell even the much famed tensor cores/units are nothing but an optimised int/float format and and optimisation to not write intermediate results back to registers.