I believe it was Hector Martin who discussed it on Mastodon a while ago.
It would have been trivial for them to lock out other operating systems entirely.
Even the Asahi team has been much more appreciative of Apple leaving this open.
It is trivial for them to lock out other operating systems entirely.
Absent that, it'd take some kind of sustained right-to-repair, EU morality, many sternly worded letters pressure campaign.
Plus, once they did (officially), they're kinda committed to keep doing it. That's explains why they remain okay with emoloyees helping on their own time; all the upside, none of the down.