> It's not that good but it's gonna get there eventually, given the hype around wasm and <canvas> technologies

Is it though? Canvas is basically invisible for anything that doesn't have functioning eyeballs (which include not only screen readers, but also mundane things like your browser's ctrl+f functionality, google's crawler and siri). You know how people complain about some SPAs' back buttons and scrolling being terrible? I feel like this "next gen" tech is just gonna be more of the same excellent-in-some-aspect-but-completely-subpar-in-others stuff.