It is true that some electronic and digital equipment could possibly affect some of the aircraft equipment of up-do-date modern airliners...
But we are dealing with an age of "overstandization" - hiring cabin staff which could confuse a A-340 with a DC-3 as far as which cabin PA briefing is applicable, and applicable restriction to the aircraft type -
So, to "overstandize", it is now customary to require flight attendants to ban the use of all such equipment during takeoff and landing, and often for the entire flight - this they do regardless of type of aircraft type...
Global International Scareways probably has a single standardised cabin boarding PA for their A-321s and Ford Turbo-Trimotors... I hope they standardize their PA for choice of "salted" and "non-salted" peanuts as well...
(a pilot who absolutely hates - with passion - to fly as a passenger)