The issue is Linux (and Windows for that matter) applications have extremely bad graphical feedback. I haven't seen anything actually competing with the macOS/

The issue is Linux (and Windows for that matter) applications have extremely bad graphical feedback. I haven't seen anything actually competing with the macOS/Safari way of touchpad response. The 3-finger expose command just slides all the windows a bit out of the way so you can switch fluently. On Safari, scrolling is natural, fluent and non-jarring even on long documents. Just slide a bit to the right with 2 fingers and you get a 'peek' of the previous page in your browser history. If you release the trackpad before completing the gesture the current page slides back gently like a real bit of paper. Pinch to zoom now works on other browsers, but still not as fluent as in Safari. It takes a tremendous amount of effort to coordinate the data collected by the trackpad, the OS response and graphics stack. If one of those components do not cooperate the 'magic' feeling is lost. I presume that is the issue with big, siloed companies or OSS projects.