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I believe an OS based on WASM could have merit. For WASM, there is the AssemblyScript language, which was inspired by TypeScript but runs faster because it avoid the complexity of JavaScript runtimes.

<https://www.assemblyscript.org>, <https://leanylabs.com/blog/assemblyscript-intro>

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an OS based on WASM could have merit

Came here to say this. Beyond Rust and AssemblyScript, there are quite a few other programming languages that target WASM, meaning that WASM is a good candidate for that holy grail, the unified environment where you can write your stuff in 'any' language and re-use and talk to stuff written in 'any' language without relying on relatively clunky, type-challenged and slow IPC.

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