The A359 is the first ULR capable widebody that can get out of Dublin when wet, and that’s a crucial bit;wet. EK regularly have to offload up to 20T of cargo when the runway is wet.
The other crucial bit is high temps. The SFO and LAX 330s often have to offload in hot calm days too.
The 777x in all likelihood will not get off the new runway when wet at MTOW. So really if DUB are serious about getting Tokyo, Singapore or South America on the departure boards in future, it’ll be A359 or nothing.