What's special is that recently browsers have been much better about not randomly shipping features unless there is some consensus from the other browsers. Ins

What's special is that recently browsers have been much better about not randomly shipping features unless there is some consensus from the other browsers. Instead, they've been implementing them behind runtime flags, getting specs written and agreed on, _then_ shipping. As in, recently there have in fact not been these sort of arguments because browsers have somewhat cooperated to iron out issues before shipping.