This is really, really cool!
Skia is a incredible abstraction layer. The linked article at the top of the OP https://fathy.fr/html2svg (2022) has some great graphics of how Skia can support various backends including PDF rendering (via https://skia.org/docs/user/sample/pdf/).
It's also worth noting that the Chrome Graphics team is writing yet another Skia rasterization backend, just announced last month: https://blog.chromium.org/2025/07/introducing-skia-graphite-...
Given that this article came out a couple years ago, it's quite possible that it was seen by the Chrome team and inspired them to look at making a new backend from scratch!
IcyWindows•1h ago