[BenjiWiebe]

I think I disagree with you on both of those points.

On Windows, you typically have to install language packs to get more languages.

Also, how many image resources does Windows-the-OS have, and how large are they? There are some, but the largest I can think of right off are the device icons in the hardware & printers screen. And most of those get installed later since they are part of the driver.

[philistine]

macOS contains all languages at boot. You do not need to download anything to switch from English to Japanese. What makes macOS so big these days are the large language models of Apple Intelligence.