The irony here is that if you seriously want to tweak OSX, what do you have to do? That's right, edit startup files and xml files manually. Supposedly this is considered progress

For what it's worth, one can easily create a "extensions" folder on the amiga as well, and create a single file for every tiny bit of startup code - but really, what's the point? Make it easier for Mac users? Why?
I personally never found Macos particularly user friendly, with all its various secret hotkeys for ejecting CD on bootup, space wasting menu bar, lack of proper CLI, messing around with applescript to do the simples things, silly lockup situations because floppy was ejected via menu instead of trashcan, high priority system sounds (DOSing mac users on terminals by sending bell to them; quack quack quack...), windows on network drives opening outside of the display because it remembers the location it had on a different machine... half duplex sound system (not being able to record while playing sounds at the same time, had me pussled for a while), apps hanging around even after you close last window (lots of peeople forgot to quit apps and kept starting new apps till they ran out of RAM)... ugly hacks like ram-doubler, disk-doubler, speed-doubler, whatever-doubler, the damn data and resource mess making interchanging files with other systems a mess, the charset, the line breaks, the horrors of stuffit in all its incarnations, all the hoops and flames one had to jump through to change apps assosiated with a given file, the single button mouse, the powerswtich on various quadra and early powermacs located where many people would expect floppy eject to be... our poor 10Mbit network being bogged down by the very chattative appletalk... ok, enough for now.