A nail, from what I hear about that side of things, but on the Apple side I could substitute the dual replacement of UIKit and AppKit with SwiftUI that somehow still isn't good, plus separate pressure coming from all the cross-platform options between iOS and Android.

At this point, I think HTML+JS is able to be a better choice than SwiftUI for most things: Yes, some stuff will still need to go to a native layer, but that's true for HTML as well. ;P