Most games, image processing libraries and other compute demanding libraries already use WASM in the browser. Have been for quite some time. It's already widely used in every case where it provides a substantial benefit.
But writing for GUI, which is what 99% of JS is used for, WASM provides little benefit. The speed bottleneck is mostly in DOM manipulation. And every web GUI framework uses 200 npm packages with something like webpack. Getting that to somehow work with your WASM code would be a nightmare if it's even feasible.
Agreed. Why would a person need to look it up when the name literally describes it. Directed? Means connections are in a single direction. Acyclic? A-cyclic = non-cyclical, doesn't have cycles. Graph is... well a graph.
Which part does the author think an average programmer should struggle with?