Still boring, indistinguishable from the rest, and still hideous. Hire a proper designer for fucks sake. Ridiculous everugly phone.
IE has been dead and buried for ages. Edge doesn't have even close to the same market share and is based on Chromium.
They build more and more of their own UIs on Electron.
I honestly don't remember when they tried to snare someone to use proprietary extensions to something open. I probably have missed a few instances.
Long story short: MS isn't a saint. They are a business. And they have behaved relatively nice for so long that some young adults don't know any other side of MS now.
I do the work because I see it as payback for all the great open source software I use all the time.