SVG support has been really helpful for me to see a diverse and "real world" set of rendering results when working on Pixie. And for testing it's great to be able to grab huge sets of open source SVG files and check our results.

For example, I have a few "megatests" where I render entire icon sets or emoji sets such as https://raw.githubusercontent.com/treeform/pixie/master/test... and https://raw.githubusercontent.com/treeform/pixie/master/test...

Running these tests helps me feel more confident that changes I'm making are not breaking things.