>At that point you likely don't understand the codebase fully
It's faster to learn the part of the comebase you are interested in rather than building a whole browser engine.
>and are going to be dependant on staying in sync with chromium to get new features.
Being able to reuse the work Google is investing into th browser engine is a positive.
>There isn't much daylight between that and the often complained about limitation of Apple only allowing the use of WebKit on iOS.
The difference is you can make changes to the browser engine if you need.