Final answer:
The base plotting system of R has limited customizability compared to other plotting systems like ggplot2.
Step-by-step explanation:
The second drawback of the base plotting system of R is its limited customizability. Although it provides basic functionality for creating plots, it lacks advanced features and customization options that are available in other plotting systems like ggplot2. For example, customizing the color palette, adding multiple layers to a plot, and creating complex visualizations may require more effort and coding in the base plotting system.