You're right it's not simple, it would require a refresh of uikit and a transition period for developers to learn how to opt in or opt out. There are existing u

You're right it's not simple, it would require a refresh of uikit and a transition period for developers to learn how to opt in or opt out. There are existing ui frameworks like what android provides that show how to define ui elements, strokes, padding, margins, and text to use either scaled pixels or fixed pixels. Leave everything as fixed pixels for backwards compatibility and add scaled pixels in for new development. I can guarantee that if Apple ported the main apps like Finder, Mail, Safari, Calendar, Music to support resolution independence that other developers would jump on board quickly to keep up to date.