That's true to a point, but... is that just being lazy? Aren't those all in "compressed" vector maps and could be rendered as needed with video hardware?

Don't get me started on icons. Icons, if anything, have gotten progressively worse somehow with more resolution and colors. It's almost like the reduced color palette caused more sudden color transitions and communicated the icon's purpose back in the day.

Which might have underpinned material design... but that entire movement, at least its major expressions (e.g. Windows 8/x) is an utter disaster.