Status of "new" interiors.
B737, A319/320/321, A333- None
E190- All delivered with new interior. Standard Embraer Y and F seats, dark blue leather coach with raisable headrest, first dark blue gray in middle with raisable and adjustable headrest. New bulkheads. Sidewalls and carpet same as 1997 look.
B767- Most in new interior. Odd swoosh bulkheads, sidewalls a blue-ish color that makes the yellw overheads stand out. Coach seats have not been replaced but covered with dark blue leather, no headrests. Envoy still has old seats, a yellowing gray. Honestly, it looks terrible.
B757-
3 former ATA aircraft came with lighter, almost teal blue leather seats in coach. Bright white sidewalls. Overhead bins are new version everyone but US installed years ago that fit a rollaboard longways. Bulkheads are 1997 striped, flat not cloth. Additional galley in aft, 3 lavatories between B and c zone. A330 Envoy Class seats have been installed but recovered in a very America west looking light blue with those squiggly heat wave looking things they are so into.
Former US Airways B757s- some have been converted to ETOPs. Thier conversion to transatlantic service involved piutting the A330 seats on (they look odd like the 767), and putting too-small ovens in the aft galley. Lavatory locations are the same. Coach seats are the same 1997, maybe cleaned in 99 cloth ones.
So of the entire fleet, if half the 767s are 'done', then there are maybe 12 aircraft in the entire fleet with leather seats, 8 that go to Europe, only three of which feel natural. The coach seat on the 76 is not comfortable. Its like when you go to an old persons house and they have the furniture covered in plastic.