The point is that you can make it fast more easily. Decoding x86 instructions in parallel efficiently is taxing, whereas with ARM and RISC-V it's much more trac

The point is that you can make it fast more easily. Decoding x86 instructions in parallel efficiently is taxing, whereas with ARM and RISC-V it's much more tractable for example. Saying X86 is 40 years work is also kind of stupid, as a huge amount of the ISA dead weight, and high performance implementations have their roots much earlier than that (e.g. Intel have tried to move on at least once and ended up coming back to the OOO superscalar paradigm).