Actually, I think implementing first and standardizing later is how a lot of (dare I say, most?) Web standards came about. And without patents and other IP restrictions, I don't think there's anything wrong with that.
Consensus from Microsoft who repackages their work as Edge and profits off of it by setting Bing as the default?
Shrug, would you expect anything else from Redmond?
Consensus with whom? Other companies who just take the work they do in form of Chromium for free and repackage it?
Or the other one browser that's barely relevant due to years of mismanagement?
Firefox And Safari. Not sure which you are referring to?