We're not using diffing! Diffing has a pretty big overhead for calculating the shadow dom and going through all values and seeing if they're the same, which can be very expensive for huge plots. We use signals that get wired through from the user up to the gpu, so if the user changes something, it gets immediately and directly changed on the gpu too! that's very different from diffing and much faster.. We're surely also not the only ones doing something like that, but Alex is referring to the whole package of Makie offering the ui, performance, simplicity and visuals to do this easily