It makes me wonder if at any point in the process Microsoft approached Firefox over integrating their rendering engine vs. Chromium and if so, what the factors were in making their final decision. I also wonder if instead of "ceding" control to Google, Microsoft intends to start being a major contributor to Chromium, so much so that it almost becomes a joint effort vs. Google dominance.
If Microsoft wants to make a cross platform product that runs on Windows, Android and iOS, and they know some of that product has a web rendering engine or js, they want to target/accomodate as few embeddable libraries as possible. Electron may be one of those products, but plenty of other things need embeddable html/js. Maybe Outlook will switch to blink someday?
It also means that in theory, Chrome could STOP shipping Blink with Chrome, and ship Chrome more like they do for iOS, where the rendering engine is part of the OS not browser app.