In 1944, Hans Hilfiker designed a station clock that ran on a synchronous motor locked to the fifty-hertz grid frequency. It has no digital display, no network connection, no software to update. The design has not changed in eighty years because it does not need to.
Precision is invisible
The red second hand, added in 1953, was not decoration. It was a signal: the train departs when the hand reaches the top of the dial. No countdown, no notification, no confirmation dialog. A million passengers learned to read the gesture without ever being taught.
The best infrastructure is the kind you stop seeing after the first week.
Speed without stability is velocity toward a crash. Some things are worth designing once, building well, and then leaving alone. The second hand still sweeps every sixty seconds. The trains still run. And nobody ever has to reboot the clock.