After suing each other for the last few years in various courts around the world, you'd think that if Apple and Samsung were human beings they would have walked away from their rocky relationship a while back. The Wall Street Journal explains (beside the larger fact that they're both huge companies with complex links, rather than a squabbling couple) why it's so hard for Apple to take up with another supplier. Things are starting to look different, though: "Apple's deal this month to start buying chips from TSMC is a milestone. Apple long wanted to build its own processors, and it bought a chip company in 2008 to begin designing the chips itself. But it continued to rely on Samsung to make them. ... TSMC plans to start mass-producing the chips early next year using advanced '20-nanometer' technology, which makes the chips potentially smaller and more energy-efficient."