The ecosystem of Servo is very very different. It's very modular and many components are fast moving targets developed by multiple companies. While with ladybir

The ecosystem of Servo is very very different. It's very modular and many components are fast moving targets developed by multiple companies. While with ladybird it's a comparatively singular thing (developed mostly by a single guy). The embedding is a serious and ambitious effort and possibly one of the reasons why Mozilla dropped it. It has to support vast array of ecosystems and compete with a very mature and widespread electron/chromium to cover the same use cases. It's a massive effort, but is already being experimentaly integrated by companies (like embedding into Qt toolkit).