I guess Figma uses WebGL next to WASM but not sure. There are some pretty successful gaming niches like Facebook Instant Games where pretty much all games use WebGL via some sort of middleware, even though most games are simple 2D puzzles. In general, that those web 3D engines (three.js, babylon.js, playcanvas, pixi, etc.. ) even exist for so long must mean that there's some sort of demand for them.