This is deeply disappointing, and all the more reason Microsoft never should have adopted Chromium. They will eventually have to maintain a hard fork, the differences will grow such that they eventually have to increase their engineering spend on it to keep pace with just managing the rebases and patches or reimplement features themselves, and despite all the good will they had for the Chromium team they will see none of it returned by the larger Google/Alphabet corporation.
They should have based Edge on Gecko and invested money in taking marketshare away from Chromium so that the W3C/WHATWG can operate as intended with multiple implementations for a single specification. Instead they embraced the Chrome monoculture and were either treated in bad faith or the Chromium team mistakenly believed everything would be fine with a reset in relations. The result will be that Google retains a veto on web technology that competes with them for the next decade or more.
Use Firefox, everyone.
[1] https://mashable.com/2013/01/05/google-maps-windows-phone/
[2] https://www.theverge.com/2013/8/16/4627342/microsoft-google-...