It would be great to see this happen. Being curious, a couple years ago I read the ChromeOS touchpad driver ("CMT") to see why it worked so much better than other Linux distros. I don't have the reference handy but the short version is they bypass X11 due to the need for high frequency and subpixel scroll events. The highest fidelity technical answer is probably to bake scrolling into the UI toolkit and compositor, and you likely have to do this to match Mac / iOS performance. You can see Apple's approach reflected in the NSScrollview documentation [1] and elaborated in [2].

1. https://developer.apple.com/documentation/appkit/nsscrollvie...

2. https://gist.github.com/zwaldowski/8710fddc8b0b39d2c152#10_9...