I disagree with your statement, writing web applications as a developer would be way easier because they all share the same APIs and core, this will reduce the usage of poly-fills. This would be an significant improvement! :)
I agree. The only time this becomes worrisome is if Google ever gets to a point in the future where they do "okay, the web is good. we're done now" and then everyone's on the same engine so browser diversity and innovation come to a halt.
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