Because they took upon a very hard task, and kept punching it year, after years, through, low margins, highly cyclical market, extremely low returns on capital,

Because they took upon a very hard task, and kept punching it year, after years, through, low margins, highly cyclical market, extremely low returns on capital, tricky clients, and a marathon like RnD expenditures. They are the leader because everybody else dropped out, and went to make money on something easier, like making Wordpress websites.