>> AX originated in reference to UX (User Experience) and stands for Accessibility Experience. AX is also sometimes used as a synonym for accessibility.
Seems to me that they are simple saying its not important:
"At 50 years, it’s only natural to look back. But Apple has always looked forward, building tools and delivering experiences that enrich people’s lives. As we celebrate how far we’ve come, we’re inspired by where we’ll go — together."
And, no, I don't think they left it to chance.
Also there's an art video to go with the art animation.
We still do not know where the urge for truth comes from; for as yet we have heard only of the obligation imposed by society that it should exist: to be truthful means using the customary metaphors—in moral terms: the obligation to lie according to a fixed convention, to lie herd-like in a style obligatory for all. Now man of course forgets that this is the way things stand for him. Thus he lies in the manner indicated, unconsciously and in accordance with habits which are centuries' old; and precisely by means of this unconsciousness and forgetfulness he arrives at his sense of truth.