The new technologies like are very nice additions but they could have left it at that. Instead they give you things like maps, ibooks and tags. I don't even know the purpose of ibooks is. I could just have a folder with my all of my pdf files neatly organized in one place. Could see it in spotlight, finder, dock, desktop in a pinch. Why didn't they just give the people the choice to download if they really wanted to have things like ios notifications, maps, tags and tabs in finder. Pretty sure they all existed on OS X before Mavericks. I could remember the time that I ran SL with just 2gigs of RAM. For neat and slim. Now 8gigs wasn't even enough for me on ML when the exact same usage. Not sure how much Mavericks changed in the memory department but it does seem they they keep introducing new bloatware and bloated features instead of sticking to barebones.