I'm usually the first one to sneer in disbelief at super users who 'go nuclear' and disable the likes of javascript and images when browsing the web, but lately, I've been experimenting with having custom fonts disabled (that is, fonts I don't have locally), and it feels to me that page loads are much faster, and in some case more readable (pages feel 'cleaner'?). The only issues I've come across so far is when a sit…
I have most blocked as well through my ad blockers. The biggest annoyance is when they use fonts for icons instead of images. I’m not sure where that trend comes from, but it’s obnoxious.
(1) The options for controlling the style of SVG elements (e.g. on hover) are not great.[0] In contrast, font icons can be styled as easily as any other text.
(2) Font files are usually smaller than their SVG counterparts.
(3) Font rendering is faster than SVG rendering.
(4) IE did not support SVG until version 9, but supported custom fonts since version 5.
(5) Old browsers that did support SVG had serious issues with SVG sprite maps, ranging from creating duplicate rasterisations of the entire SVG file in memory for every use of the same file in a document, to not caching the rasters at all and regenerating them every time they needed to be repainted (e.g. during scrolling). These are fixed now, but inertia is what it is.