I’ve realized that the display size, in inches, is sometimes in the name or model number of electronics that are sold not just in the US. Do people outside the US also talk about buying 55-inch TVs, 14-inch laptops, and 27-inch monitors? Does it naturally roll off the tongue or does it seem strange to anyone?
If it’s all inches, why didn’t measuring screens in centimeters take off?
It actually works pretty well by chance more than anything else. 1000 ft is a really good altitude separation between aircraft. 500 is a good offset for irregular traffic too. Multiples of 150/300 m are more annoying to work with and 500/1000 m would waste an excessively large amount of airspace.