The final version of the “wedge” Air case was an amazing piece of physical design. The lid had a large-radius complex curve that perfectly controlled reflections. The bottom case had a curve that made it look like the machine was hovering above the desktop from almost any angle. Calling that a “hack” is sort of like calling it a “hack” that a Ferrari looks fast even when it’s parked.
The new designs are overtly boringly utilitarian. I would say they intentionally look ugly. I guess this must have been intended as a marketing signal.
And it seems like it’s working since you think the new design delivers better battery life. It doesn’t! The 13-inch M1, M2, M3, M4, and M5 MacBook Airs are all specced for 18 hours of battery life.