superior, inferior, irrelevant.
a measure is a measure not one better than the other.
well, as long as you measure twice
Not irrelevant. Just look at the left hand/right hand drive, and the 110V / 240V incompatibilities. Ignoring some inherent protectionism, such stupidity has cost the world's economies dearly. Ease of use and standardisation are everything.
Anyone doing PCBs outside Liberia, USA and Burma who are working with imperial measurements should stop living in the past and get with the modern world. At my workplace, it is mandatory that all PCB designs are done using metric throughout, as defined by our company's PCB Design Standards.
Agree with the measuring twice. Nothing worse than that feeling one gets when cutting some timber too short when the hardware stores are closed and the timber is not cheap. Been there, done that, not fun.