Well they might count on a great deal of open-source development and related good-will, not to mention they are probably already using a lot of standard librari

Well they might count on a great deal of open-source development and related good-will, not to mention they are probably already using a lot of standard libraries and applications to provide expected functionality. I wouldn't mind not having many "commercial" apps available if I could just use almost any already existing open-source application, not unlike on Linux desktop systems. I know it doesn't look easy for Jolla and Ubuntu Phone, but I hope at least one of them prevails so we can have a reasonably open Linux system running on phones.