On: TfL's simple pop-up message led to a significant d...

[ta1243]

But not Oyster

[madeofpalk → ta1243]

Are you referring to no Oyster west of West Drayton? Or some other obscure quirk of the Elizabeth Line?

[ta1243 → madeofpalk]

Yes, you can only use contactless to those stations, due to Oyster's limitation of 16 zones.

[anticensor → ta1243]

16 zones limit would not have existed in the first place if they did not insist on keeping all the fare info on the card. Many fare systems do fine with online-only operation.