My question was a request for clarification, not a challenge to your assertion. I don't have any reasons to believe that they are or aren't going to make a browser with it.

Regarding browsers, the blink engine has one important advantage over its competitors - embeddebility. That's why so many browsers have blink in its core. Servo had a similar goal with Chromium Embedded Framework (CEF) compatibility. They dropped it due to some technical difficulty. It would have made servo a drop-in replacement for blink too. I wonder how the embedding story with Servo is, these days.