This is absolutely expected, reasonable and the way to go for an rich GUI app such as Google DOX. Particularly since WASM is so widely adopted, so does Canvas, WebGL etc... and Rust compiles to WASM, not to forget. So it was about time that some major apps ditched all the DOM glory.

Wonder whether they're using the greatly overrated Angular to render the canvas, i guess not, but that's for Google insiders to say.