via the same @matthewstoller piece, from the DoJ complaint (I think), a good explanation of the kind of thinking that leaves Apple Mail languishing in sucktitude despite the trivial amount of investment it would take to maintain it as a great mail client.
https://www.thebignewsletter.com/p/why-the-apple-antitrust-suit-matters
Text: For example, Apple's vice president of iPhone marketing explained in February 2020: "In looking at it with hindsight, | think going forward we need to set a stake in the ground for what features we think are ‘good enough’ for the consumer. | would argue were [sic] already doing *more* than what would have been good enough.” After identifying old features that “would have been good enough today if we hadn't introduced [updated features] already,” she explained, "anything new and especially expensive needs to be rigorously challenged before it's allowed into the consumer phone.”