There is a point...
When you're claims are rejected enough times that the only recourse is the Supreme Court. Typically the other players in your market will try to keep you from going that far, as it might endanger lower court rulings in other circuits that are favorable.
In an oddity of the US Judicial system, if a district or circuit court (covers a number of states and there are 13 total) rules one way in a case, but a different court in another part of the country rules another (or takes a different tack to arrive at the same conclusion) you end up with different precedents. As the Supreme Court cannot overrule or invalidate those rulings without a party petitioning the court, this creates areas where certain legal action is favored. As each court is largely independent and able to have their own process, it can mean that some plaintiffs prefer certain settings.
If, however, you continue to sue and appeal, it will eventually reach the Supreme Court. If there is a lack of coherence among the various circuits, that tends to prod that old bear into taking a case. It's at that point that a point of no return is reached. You can't settle out of court once the Supreme Court takes on a case. So if in this case, Marvell tries to rely on a trick or procedure that is typically beneficial to IP owners in the hardware space, and it's found to be lacking in front of the Supreme Court, suddenly you aren't invited to the Silicon Valley Christmas parties, and you get a lot of mail returned as undeliverable or marked "Return to Sender." Just see the current software patent case that the Supreme Court entertained the other day. The list of software and IP holders on both sides is rather extensive. Someone is going to lose, and it won't be just a "Reserved for low-emission vehicles" space at the local Y....