[Spivak]

> If there were multiple mainstream browser implementations with split market share; it would be painful for web developers.

But good for users which is the tension. Having multiple browsers that have significant differences that you can't not develop for means that you actually have to gracefully degrade instead of demanding everyone else behave more like Chrome. If we're at the point where were calling Chrome the reference then what's even the point of other browser engines? What would they even bring to the table except the skin?

This is one of those weird arguments that actually supports iOS forcing developers to use Webkit. The only differentiating features of browsers are the skins so quit caring about the engine /s.