What improvement was made in the rebuilding of the windmill In aninal farm?

In George Orwell's "Animal Farm," the rebuilding of the windmill after its destruction represents a significant improvement in the animals' commitment and perseverance. The new windmill is constructed using more advanced techniques and materials, reflecting the animals' growing skills and determination. Additionally, the animals work harder and more efficiently, showcasing their collective effort and unity, despite the oppressive leadership of the pigs. However, this progress comes at a cost, as the animals endure increased hardship and exploitation.