Since when does RDU - ATL get the 75S these days?

We get a ton of 757s due to the heavy traffic between here and ATL but not 75S.

We used to get the 75S once a day in each direction as the plane rotated on/off RDU - CDG but these days it’s a 763 (soon to be 764) and I believe they will soon be switching back to then plane swapping at CDG (with the CVG route) instead of swapping through at ATL.

My question is why they don’t use them on getting back to on some thinner TATL routes but I think with the AMS and CDG hub approach, DL has largely gone away from thin TATL routes and outsourced all of that to AF/KLM as a connection.