[tylertyler]

I work at https://PaperlessPost.com which isn't trying to melt anyones face with bleeding edge tech, it is blending these new features into a product to provide utility for normal people. For us this advanced stuff comes in based on the design you choose. Most of the "Flyer" designs have layers of animation, some examples that would use custom encoders and decoders implemented with WebWorkers, WebGL, WebAssembly along with some use of WebCodecs which is only available in Chrome now. https://paperlesspost.com/flyer/grill-time https://paperlesspost.com/flyer/roll-the-dice.

But other designs without animation would use 2d canvas in the editor and static images when they are sent out. In my mind the most advances stuff you will find out there is really about the "engines" that have been made in JS that might use some of these new APIs but without a sizable abstraction layer on top of them are likely not much more than a tech demo. Something like Google Maps or any of the web audio or graphics editors usually has way more "engine" type code with very carefully thought out performance considerations within it and the code that actually calls these APIs is often wrapped up and abstracted away as much as possible so that these APIs are called as little as possible.