I don't think he predicts that returns will accelerate literally forever, so I don't see the contradiction.
By the default, LAR is forever. Very much like the accelerating expanding of the Universe. Else it should be explained when and how it starts to faint.
I am not 100% sure, that the LAR will not overrun the speed limit c. Not likely, but it might.
I realize this is late notice, but I just found out. He goes on at 8pm and will likely be answering questions by 9:30. I would like to ask him some great questions and I will ask as many of the best that I see here as possible. Any ideas?