Breaking them up creates a world of enforcement problems, since Microsoft has all the respect for the law that the Scientologists do.....
Gotta disagree with you (partly - see below) there. The whole point of the break-up idea was that (hopefully) this would've solved the issue. I mean, what else are ya gonna do? Fine 'em? (They've got tons of cash.) Threaten 'em with decrees and judgements? (That's how we got here.) The hope (I think) was that if they broke Microsoft up, the problem would be fixed and that would be the end of that.
I don't think it would've fixed the problem, but I think that's what they were thinking.
If they're broken up, what does that do to claims against them? Oh, you shouldn't be suing us, you should be suing them. Now, there's still just the one. Less confusions for judges and juries.
Now that I agree with and it might be why they let up. It an interesting point.
But the other point about the breakup that was it was an important negotiation tactic. For whatever reason, a breakup is being treated as death to the company by some. Fine. So you push for 'death' and then settle for something less (which is what you wanted) later on.
What I don't get is why they are 'settling' now. (Unless they think the lawsuits are going to be enough).