Don’t let me rant about the average Apple user/fanboy/power user - way too many in my line of business … :-P
Using tags is non trivial, the thing is: If you need tags to organize your data, there are not many alternatives to tags. It is IMHO a killer application for knowledge workers and to this day, there are no good solutions on Linux, which is a shame. (Of course, org-mode has tags, but I don’t want to learn EMACS).