That comparison between the matplotlib and ultraplot APIs doesn't seem fair. Most of the difference in length is that the separate methods for formatting in matplotlib are bundled into a single format() function in ultraplot. But, in matplotlib, you can pass those as kwargs to add_subplot() [1] which would work out at a similar length (or even shorter).

[1] https://matplotlib.org/stable/api/_as_gen/matplotlib.figure....

Maybe there are much more important API differences (I hope so, as that's a pretty trivial difference to start with.) I just mention it because that's what the screenshot seems to focus on as a justification: "Why UltraPlot? | Write Less, Create More".