> The unstated major premise of this assertion is that the standard is a spec that every browser must comply with exactly. It's not; there's not a single browse

> The unstated major premise of this assertion is that the standard is a spec that every browser must comply with exactly. It's not; there's not a single browser that has ever implemented 100% of whatever was the latest standard at the time, and major browsers typically also include many of their own additions that go beyond the standard. Sure, but there is a big difference between implenting 99% of the standard and only implementing like 10%