Users don't care what's inside. Brand awareness is important. Edge will live on, even if it's just a Chromium skin.
And if Google abandons/closes Blink, MS will be forced to spend a bit on browser development again. (Or they'll just fork Firefox.)
Currently it's a win-win for them. They need the web to deliver their services (outlook, office365, azure), now they can develop those cheaper, as they don't have to spend that much on testing as Edge and Chrome will be likely very close.
And if Google abandons/closes Blink, MS will be forced to spend a bit on browser development again. (Or they'll just fork Firefox.)
Currently it's a win-win for them. They need the web to deliver their services (outlook, office365, azure), now they can develop those cheaper, as they don't have to spend that much on testing as Edge and Chrome will be likely very close.