> Name another true write-once-run-anywhere universal VM that is installed in billions of consumer devices and costs nothing. It doesn't exist.
Java certainly meets your criteria and exists. But much like the person you are replying to, I consider the "modern software ecosystem" to be utter garbage. Web browsers are just a terrible user experience for applications compared to the desktop. We have regressed greatly in user experience, not progressed.
Nor does anything about WASM. The sandbox is provided externally. The only difference is that Java standardizes functions for things like file access, while WASM doesn't standardize them (but WASI does!)
Java certainly meets your criteria and exists. But much like the person you are replying to, I consider the "modern software ecosystem" to be utter garbage. Web browsers are just a terrible user experience for applications compared to the desktop. We have regressed greatly in user experience, not progressed.