10 years? You missed it by quite some years, my friend. Apple was on the verge of bankruptcy back in 1996, but has had a tremendous rise since that time. But I guess there are many new iOS-fans around that doesn't know the history ;)
Apple should release a larger iPhone, but keep the smaller sizes. I cannot understand people arguing against larges screens, it's not like the smaller screens will disappear! I for one would buy a 5" iPhone immediately.