alt Hacker News> Airbus didn't require them because of money
I am pretty confident that aircraft manufacturers themselves cannot require these things, only regulators can. The FAA in particular used to lean heavily on budget constraints for airlines (who would also push back against expensive upgrades); but I am sure the same applies to EASA and other regulators as well.
That's right, Airbus is responsible for the faulty equipment onboard, not pilot training. Air France is responsible for its pilots' operational training and recurrent training.