iPhoto database
Am I correct in saying that iPhoto v9.5 now does things a little different in database saving? I'm sure I read somewhere that rather than saving a copy of every time an edit is done on a pic, so loads of different versions of the same pic, it now "logs" the changes and only saves one version, thus saving lots of hard disk space.
Am I talking rubbish here!?! or is this correct? If so surely this will saves lots of space now, and the question is why didn't older iPhoto's do it this way then?
Thanks
iMac, OS X Mavericks (10.9.5)