Empty Space
Member
Per IGN: "
In A New Hope Luke says he flies a T-16 airspeeder (and even plays with a model version while talking to C-3PO and R2-S2), which has turned into an ongoing joke in the new Star Wars movies. In The Force Awakens, two First Order Stormtroopers are heard talking about the new T-17s, and then in Rogue One we hear a pair of Imperial Stormtroopers talking about how the T-15 is obsolete. And in both instances the troopers are voiced by familiar Star Wars voice actors Sam Witwer (Darth Maul, Starkiller) and David Collins."
What a weird bit of sort recurring ambient dialouge. Looking at the wiki now some variant of that conversation might show up in several of the films.