“Ever since the XP-38 came out, they just aren’t in demand.”
―Luke Skywalker upon selling his X-34 landspeeder
That is an obscure reference. LOL
You’re unique in having tracked that down. There are even more obscure ones out there. While that is in the official script of the movie there are a number barely audible lines which aren’t even in the script.
Two stormtroopers chatting away on the Death Star while Obiwan is skulking about looking to decommission the tractor beam. “Have you heard about the BT-16? I hear it’s quite the thing!” “Do you know what’s going on?” Obiwan uses the force to distract them “What was that?!”
I’m going by memory here. The exact wording might be off a bit.