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On the Edge team, we had a *whole team* dedicated to finding compat bugs, reducing them, and reaching out to site owners with fixes. Sometimes we would reach out to a site owner and they'd say, "Sorry, you don't have enough market share for us to bother fixing this bug."

This is where we get -webkit prefixed CSS in the standard, as well as de-facto standards and "works best in Chrome." This is why both Opera and Edge switched to Chromium.