The pruned blockchain state changes every block. More importantly, Bitcoin is ideologically opposed to the idea of checkpoints, as they run counter to the Long

The pruned blockchain state changes every block. More importantly, Bitcoin is ideologically opposed to the idea of checkpoints, as they run counter to the Longest Chain Rule that says the true state is whatever valid chain has the most cumulative work. Even if that chain is the result of a very deep reorg that invalidates the last checkpoint.