Another reason why it was an enormous mistake for Microsoft to adopt Chromium as the engine.

Now Microsoft has a choice for Edge:

A. Fork here and pay the maintenance price and extension compat issues, with potentially unlimited downside of technical debt in reconciling the two.

B. Adopt these changes and kill ad blocking in Edge, preventing them from differentiating themselves from Chrome and reinforcing Google's position as an advertising giant.

Both are bad. What would have been less bad is if Microsoft switched Edge to say, Gecko, or maintained EdgeHTML and continued to support a multi-platform, multi-implementation web.