They can spend trillions. It still isn't totally, wholly unique. It evolved from Unix, uses elements from Free BSD and other resources, depends on Open SSL for quite a lot of the security features, and often employs other open source tools. I.e., it is not unique and it would be very appropriate for the EU to use these facts to deny Apple any copyright protection on their software, thus allowing anyone who wants to, to break down the barriers preventing them from installing software they want, without paying Apple for the (unearned) privilege. If someone wants to use the app store to sell software, more power to them, THEN they owe Apple the 30%. But otherwise, that barrier needs to be removed and the total loss of copyright protection on that (not unique) software should be the main tool to ensure that