well look onto it like with Windows OS 95, 98, ME (yes I am listing DOS based ones on purpose) they all went out of support not being invested in and abandoned FOREVER but you still won't get open source of them ever they bear no value to owner (MS), just like Presto to Opera, but they got their money from it (sponsors), and they don't want NOW anyone to have benefit of it for free lets take you invent new type of engine for cars and you earn money of it 10 years later it becomes useless and you abandon it, and now approaches you people who want to use it for their own product/car would you give it for free ?