I'll bet you it has everything to do with Microsoft realizing its a featureset to layer on top of other peoples operating systems now, ala Adobe and Facebook.

I'll bet you it has everything to do with Microsoft realizing its a featureset to layer on top of other peoples operating systems now, ala Adobe and Facebook. 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.