> Why do you believe that is the case? And what can be done to change that situation for the better? The current HTML/CSS rendering is currently done by the br

> Why do you believe that is the case? And what can be done to change that situation for the better? The current HTML/CSS rendering is currently done by the browser. That part is native which means it can benefit heavily by the resources available that way (usage of the CPU/GPU, direct access to memory, etc...). It's also made by a bunch of people, with years of experience in the domain, they can make all this Your solution would put this all on the Javascript side, which is already often put to its limits with our current usage. React seems like a better solution. It render directly to HTML/CSS, so it profit from the browser performance to render it, but you can replace the rendering with something else (like React Native).