I'm wondering how it is possible that light cannot reach us, even all the way out there where metric expansion is making the distance between our galaxy and their galaxy increase at greater than $c$.
Assuming the expansion is relatively linear (that's why Hubble's constant is "constant", I suppose; and even if it's not linear, or even discontinuous, this argument still works), it'll be exactly like the Ant on a Rubber Rope problem, in which the ant always gets to the end of the rope no longer how quickly it's expanding. Thus, the light will eventually reach us.
However, How Are Galaxies Receding Faster Than Light Visible To Observers? suggests that some light traveling in our direction never actually reaches us. Thus, there are some galaxies out there whose light will never, ever, ever (assuming infinite expansion, heat death, no interstellar extinction, etc.) reach us. But that doesn't make sense with the Ant on a Rope argument!
An extension to this problem would be (if I'm correct in the above), what would it actually look like? Would it appear that the galaxy is receding slower and slower, since the light beam is so awkwardly distorted? How massively would it be redshifted?