“It’s actually quite remarkable that a program in the modern era can survive for so long in such a preserved state.”
System Preferences looked about the same in macOS 12 as it did in Mac OS X 10.0. Dark mode lives under General, Night Shift under Display, and storage takes four clicks through About This Mac. This mockup copies the iOS sidebar layout and calls it Settings. Apple announced almost exactly that for Ventura a week ago, which says the fix was always obvious.