Because most of the images out there are in pixel and not vector format. Converting the latter to the former automatically doesn't always produce the desired re

Because most of the images out there are in pixel and not vector format. Converting the latter to the former automatically doesn't always produce the desired results. At https://starthq.com https://starthq.com we do use SVG for the logo and all icons. Falling back to PNG for older browsers requires a CSS hack though and that fails on some older mobile devices.