I traveled Thanksgiving weekend, and got cakes per my tradition. Some new cake data points to share...for my ex-HKG flight, it looks like they sometimes do two smaller cakes now instead of one bigger cake.
For ex-TPE in economy (where food service feels straight chaos because flight attendants are rushing due to short flight time), I found out there was enough time to take a picture and eat a slice of cake haha. CX crew is very efficient. It actually was one of the best tasting cakes too.
I'm flying from Shanghai (PVG) Christmastime, and can report back what kind of cake they do in a few weeks

ex-LAX (Nov 2025)

ex-TPE (Nov 2025)

ex-HKG (Nov 2025)