Funny how accessibility seems to be both. Too complex and manpower-sucking to actually fully support, and cheap, because someone need his argument to work. As a VoiceOver (blind) iOS user (since 13 years or so) I submit you are underestimating the complexity of something like shipping a screen reader for every device you put out. Yes, there are days where I hope the Accessibility Team had more resources to fix obviously long-standing issues, but that doesn't let me forget what a gracius gesture it originally was to say "Fuck ROI, we're going to be the first to do this."
The entire organization is very small. The work is complex, yes. They get to work early on their new platforms, which is great planning and prioritization. All great stuff.
But if it took an organization 1,500 people strong, like Maps and Siri did, I’m not so sure the Apple of today would do it.
The praise goes first to the hard working engineers and managers who deeply care about this stuff, and second to management is all I’m saying.
For context, I built the Shortcuts app!
(edit: AX is also a much broader effort, because it improves usability for everyone on the ability spectrum, and it digs into design, too. So I do think it does have a more foundational role because Apple is still at its core a design-driven company. I think of all of the effort to make the apps usable at all text sizes, for example. The easier to use the products are for more people, the more people will buy them. There are less inherent trade-offs in AX than with the environment/carbon, where selling fewer devices is in direct conflict with sustainability goals.)