I thought Apple are notorious for NIH, and looking down at interoperability in general. I surely didn't notice that the opposite is almost always true.

Can you cite any examples of where Apple has eschewed standards or interoperability without a good technical reason? I suspect anything you list will be either:

• No interoperable standards were available at the time;

• Distinctly better than / more capable than contemporary interoperable standards;

• Maintaining a legacy decision made for one of the above reasons.

Practically everywhere. From USB in hardware to touch events, WebRTC and MSE in the browser.

Anyway, no interoperable standards were available at the time doesn't excuse them not adding these standards when they become available.

Maintaining a legacy decision made for one of the above reasons is exactly NIH and attempt to sabotage interoperability.

USB? You're not even being serious.