The visual system was refined so different chart types could feel like part of the same library. A larger catalog made it easier to compare possible representations before choosing one for a website or report.
The guides were connected to implemented chart output. This matters when learning an API: the example image and the code should describe the same result, rather than leaving readers to imagine what a configuration will draw.
Source-artifact workflows and CDN build, pinning, and verification work accompanied the visible changes. Their role was to carry the expanded catalog into the browser examples.