Unless you want to install a crypto miner to run locally on someone's machine when they visit a website.

Now possible with this as well as even more capable closed-source untrusted binary blobs with DRM running amock on your machine.

Mozilla (a member part of the W3C) and was supposed to stop such DRM-like software from reaching the web. They have proven to be powerless to allow such software like this to be approved as a web standard.

The ones cheering WASM are the ones who absolutely love DRM and malware blobs in your machine now accessible in the browser.

This is a massive failure of the so-called "Open Web".