I feel like binary translation is a better approach. It’s a temporary workaround that allows users to use non-native programs while they are ported properly. ARM64EC seems like it will incentivize “eh that’s good enough” partial porting efforts that will never result in a full port, while making the whole system more complicated, with a larger attack surface (binary translation also makes the system more complicated, but it seems more isolated/less integrated with the rest of OS).