Look at the original 2001-2007 version, which was the nicest. It's only gotten worse over time, unfortunately. The 2020 version got an unnecessary rounded rect because macOS Big Sur introduced iOS rounded rects as a new style, and then the 2025 went completely rounded rect because Tahoe enforces it on every app.
I personally have Disk Utility in my Dock, by the way.
That's not true. You can see the history of the Disk Utility icon here: https://basicappleguy.com/basicappleblog/macos-icon-history
Look at the original 2001-2007 version, which was the nicest. It's only gotten worse over time, unfortunately. The 2020 version got an unnecessary rounded rect because macOS Big Sur introduced iOS rounded rects as a new style, and then the 2025 went completely rounded rect because Tahoe enforces it on every app.
I personally have Disk Utility in my Dock, by the way.