But I suppose also there's less fun allowed, the article mentions this easter egg was removed in 1997 when Jobs returned.
- modern screens are higher resolution, and so require much larger image resources.
- modern OSes contain all translations in them. In the 90s it was common to have language-specific versions that only contain that language and maybe English.
In the specific case of macOS, it also contains double the code it needs because it runs on both x86 and ARM.
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.