Say goodbye to writing multiple kinds of plugins and userscripts for random websites I guess. I don't want the transition to wasm because it looks like it will make most things unchangeable binary blobs
Wouldn't there be a point where the mainstream approach is to just have compiled blobs write directly to the canvas, say a point where someone compiles a qt application and hosts it on their website.
What can you even modify there, when all the structure is flattened into a single layer
You can already make apps that write directly to a canvas today, and almost nobody does because they want what the DOM provides for them. Wasm changes nothing about the APIs available to web apps.