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Re:PX or REM in CSS? Just Use REM by culi on Sunday December 04, 2022 @01:43AM (#33851242)
> 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

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