Ask HN: Why's today's Google Doodle done with 2010's createjs?

Just curious if anyone knows the reason for animating the Smores.js bear using gskinners EaselJS circa 2010, as opposed to Pixijs or something more modern?

https://doodles.google/doodle/celebrating-smores/

source: https://www.google.com/logos/doodles/2024/storybook/smores-22445/smores.js