Parts of Servo succeeded, like the webrender GPU stack and the CSS selector engine. The parallel layout engine failed. It just kept running into corner cases t

Parts of Servo succeeded, like the webrender GPU stack and the CSS selector engine. The parallel layout engine failed. It just kept running into corner cases that didn't handle parallel layout well. If you look in the layout_2020 folder in the source repository, you can see an in-progress pivot to a new approach that would hopefully have less problems, but now we'll never know. This isn't a surprise. It was supposed to be a research project; if parts of it didn't fail, that would be a surprise.