Netflix has changed the way their interface works to improve their users experience. This will require changes to the application on our devices. I guess Apple and others no longer offer support for their older devices unlike say a Firestick that automatically updates.
I have an old 'dumb' Pioneer that works fine with a Firestick using WiFi.
if the change to their interface causes their users to no longer be able to view their service then how the heck can it improve the users ‘experience’. All the other services on Apple TV work fine. They are forcing you down another route.