Data point:
OTA: ebookers.de
route: FLR-CDG-JFK-LAS-LHR-DUS
when: april
14th Dec: @ AA website first segments were dropped and are not visible anymore. JFK-LAS-LHR-DUS still there for now.
17th Dec: Still no email from eBookers.de informing me about the changes
AA website: same as on 14th dec
Saudi website: original itin still intact
eBookers website: same, original itin still intact
Alitalia website: "Unable to locate reservation. Please try again."
Air France website: "Your reservation file is empty. Please contact our customer service for information about this file"
Will wait for news from OTA before calling them.