> 1px is not 1 physical pixel anywhere anymore Nowhere did MDN make such a statement > Also 1px is a digital unit and as such it does not have an “inch” equiv

> 1px is not 1 physical pixel anywhere anymore Nowhere did MDN make such a statement > Also 1px is a digital unit and as such it does not have an “inch” equivalent They're referring to the CSS "inch" (aka `in`). Which, similarly to the "pixel", has an arbitrary but well-defined meaning