When people say that Google killed the Edge browser they generally mean that MS gave up on maintaining their own browser engine and the world moved that much closer to a web monoculture. To put this in historical perspective, a reskinned IE would not have been a meaningful or useful competitor to IE.

I don’t think it’s a meaningful comparison because Microsoft has the resources to fork Chromium if they need to. But since it works pretty well, there’s little incentive to do that. It would be like Electron forking V8 for no reason.