Doesn't Skia have a very fragile API? I remember reading that they were breaking their API/ABI all the time. If nothing else, Cairo's API is always backwards compatible.

It is at very least a pain to set up, specially on Windows.

I’ve always been curious why Google didn’t spin out Skia. Maybe because it lacks the UI primitives you really need to make it useful?

What do you mean with "spin out"?

(sorry English is not my first language)

Take Skia and promote it as a toolkit independent from Android, Chrome, etc.

It would already help they had binaries available, or not expect externals to replicate their build infrastructure.