I see any web-scale runtime standard inevitably having versions spread across the installed base of any server, so prone to the same pressure JS was, which led to polyfills, graceful degradation, object detection, monkey-patching in full. People who complain about this are complaining about physics.
You're right to worry about security, which is why the "MVP" for wasm is co-expressive with asm.js, just faster-to-parse syntax. After that, we must be even more careful.
I see any web-scale runtime standard inevitably having versions spread across the installed base of any server, so prone to the same pressure JS was, which led to polyfills, graceful degradation, object detection, monkey-patching in full. People who complain about this are complaining about physics.
You're right to worry about security, which is why the "MVP" for wasm is co-expressive with asm.js, just faster-to-parse syntax. After that, we must be even more careful.