@marcedwards I never used autolayout, but I don't think layout is the most critical part of a UI framework at all â 98% of the layouts in my apps are done by hand in -layoutSubviews et al. UIKit is the most-correct thing out there (it was âAppKit 2.0â after all), and I wish Apple had built an 'AppKit 3.0' to bridge all the platforms. Autolayout and late-era Interface Builder poisoned the well and drove people to yearn for something like SwiftUI, but both are unnecessary and completely optional