Interesting design choice. I use OSX (work laptop) and Linux Mint (home PC) and your comment got me thinking about their "minimize" button: I hate OSX behaviour of the minimize button: It hides the window and adds an additional icon in the task bar... before getting used to it for me it seemed as if OSX was "hiding" windows from me. Linux Mint has the expected (i.e. Windows 95) behaviour. Nevertheless I don't think I use a minimize button as long as I did before.