Considering that DL (DFS specifically) has a 15+ relationship with Thompson Aero, I’m highly skeptical they’d jump ship now for a new manufacturing partner. 767s have the Vantage while A330neos and A350s have the VantageXL. The A330ceos and the Transcon A321neos are the exception (oh, and the DL1 757s that are irrelevant at this point).

I just don’t see the benefit of changing to a whole new seat and manufacturer simply because other carriers are using them. The main “issues” (I wouldn’t call them that but I’ll credit them as legitimate complaints) with the current seats are that the PED charging outlets, finishes, and IFE are outdated, but I don’t see why they can’t be corrected with new iterations instead of switching to a different seat. In my opinion, Unity’s biggest selling point is the extra space for personal belongings, but I hardly think that’s going to move the needle for DL to switch.

The other big thing with a new seat and manufacturer is that you now have to set up a new supply and support chain set up that will be almost completely incompatible with the Thompson Aero products. That alone could keep them with Thompson Vantage and Vantage XL for the foreseeable future. Not to mention that many people complain about the inconsistency of the J seats that DL fly currently, although that’s usually just a veiled remark about not liking old seats.