You know, I don't recall getting notified of a schedule change on AA in a long time. Maybe they've stopped doing that, with all the available automation. We recently traveled to Europe and they switched from a 2-5-2 version of the 777 to the dreaded 3-4-3. We had been in the 2 part. Oh, well.
With the addition of American's new aircraft the equipment changes are more frequent. I still miss the 2 side of the Mad Dog, too.