Laughable because the hyperspace is pretty much the only thing he preserved. And it’s really such a small thing.
I imagine this is how the conversation went:
“She (ANH) will make point five past light speed.
It may not look like (a big point of contention to preserve the depiction of hyperspace until ANH) but she’s got it where it counts.”
Aside:
“I’ve added some special modifications myself…”