This is an interesting question.
Few years ago, now late Steve Jobs proclaimed that HTML5 is the future of web development. Ok this needs to be viewed in a broader context, at that point in time Apple was waging a war against Flash and HTML 5 was a unlucky winner.
They are lazy, Jobs says. They have all this potential to do interesting things but they just refuse to do it. They don’t do anything with the approaches that Apple is taking, like Carbon. Apple does not support Flash because it is so buggy, he says. Whenever a Mac crashes more often than not it’s because of Flash. No one will be using Flash, he says. The world is moving to HTML5.