[adkadskhj]

I feel like sandboxing could be huge, but WASM might be cutting the legs out from that feature.

Sandboxing doesn't sound so unique or innovative when WASM is coming along and doing the same thing, and with a much wider audience and thus more likely to have massive traction.

[afiori]

They compete on different use cases, most js/ts apps cannot be (reasonably) compiled to wasm and also wasm sandbox doesn't limit what the environment can do.

As a glaring strawman if you expose eval to wasm it will not help you.

Deno's sandbox will allow you to crate a dedicated worker with no network/disk access to handle sensitive informations, or to force your application to use a specific worker as a proxy (by making it the only thing with network acess)