WASM is great peace of tech but I can't help to think it would be abused a lot in the future. For example, right now we can use ad blocker to block ads and analytics by blocking its js from loading. Imagine when wasm gains mainstream popularity and ad companies begin to ship their ads and analytics product as a libaries to be linked at compile time. How do we block something like that? Sure the adblocker can hide the relevant dom contents, but the code is still run and doing whatever it want on your browser.

These kind of complaints are based on a misunderstanding of how JS works or how the browser works.

You can do the same exact thing in JS right now. In fact, if anything, JavaScript makes this way easier than WASM. With JS, you can just use something like Rollup or Webpack to put your analytics code in the same code.

Yeah but using webpack is not how majority of websites deployed, so it's probably not worth the effort for ads companies to support it. They will consider this when webpack/wasm become mainstream enough (approaching 50% web), which may or may not happen. Probably won't happened but the thought always linger in my mind.

WASM is way less popular than Webpack.

Almost every site with some kind of front-end framework like React will use a bundler of some kind.

It's easy to first party ad code. I would guess that as a percentage of website usage Webpack, or at least code that uses custom bundling, is over 50%. JS knows all.

Turing strikes again…

A stronger one, actually, since it can't access a bunch of stuff.

Which is where the trouble started.