It's been a workhorse for 4 years, but I think the end is near for this little guy. Running Yosemite on this thing and the age is showing. Particularly when scrolling through web sites, it's not nearly as smooth as Mavericks. I'm not going to rush out and buy a new MBA/MBP quite yet, I'll wait until the official release and see if there are any improvements, but I won't be too terribly disappointed if I need to upgrade, I've certainly gotten my moneys worth out of this machine. Anyone else running Yosemite on a 2010 or even 2011? How's it running?