I have my own complaints with how AWS does their icons. however current icon set used by AWS is way better than the "3D" icons they had earlier I think having

I have my own complaints with how AWS does their icons. however current icon set used by AWS is way better than the "3D" icons they had earlier I think having "lines on a square" can also be converted to SVG. In fact AWS page you linked does have an "Assets Package" download that included both PNG and SVG icons for both light and dark backgrounds. the "single-color square" is actually a gradient fill too -- whether that is better is subjective. I have always felt the need for an API that serves the correct icon in chosen resolution and format. we recently saw a HN post that argued that architecture diagrams should be code. this would be one necessary step towards that.