Looks like the base Kindle also hasn't been updated at all. Same dimensions, screen, weight and battery life. They also nixed the base Kindle Kids which was the best deal considering it was the same price as base and they'd fix it if it broke.
2022: https://www.amazon.com/dp/B09SWV3BYH
2024: https://www.amazon.com/dp/B0CNV9F72P
Kindle Kids Warranty (2 years vs 1 year): https://www.amazon.com/gp/help/customer/display.html?nodeId=...