Well Andreas Kling has worked on Safari and WebKit and (obviously) has talked to a lot of browser people. He knows what he is doing, and he frequently says that

Well Andreas Kling has worked on Safari and WebKit and (obviously) has talked to a lot of browser people. He knows what he is doing, and he frequently says that no one that has actually worked on a browser thinks it's impossible to create a new one, even with a small team (...of highly motivated and skilled people).