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?
TV’s and plumbing are still measured in inches in the UK, the measuring system was already in place when we went metric and it was what people were used to. Plumbing fittings are as you said now rounded off to millimetres etc. but the actual physical size is still the same as the original imperial. For example what is referred to as a 25mm fitting is actually one inch (25.4 mm).