Apple should pay CalTech what they deserved, and then sue Broadcom for hiding patent licensing details.
Apple shouldn’t even be on the hook for anything. They are just using a chip from Broadcom. This is double dipping and should not be allowed.
You should not be allowed to license to a chip maker (or not in this case) and then expect users of that chip to need a license as well. Any violation should be on the chip maker.