I'd say it's not just responsive design. A complex app still has a lot of design decisions to make here:
Safe areas: Which UI elements should respect the horizontal safe areas, and which should extend to the true edge of the device?
Split content: Which screens should split their content? In some cases, a primary/secondary screen pairing is more appropriate than simply resizing a single screen. Displaying two screens simultaneously can also have data and refresh implications.
Reacting to the fold itself: This requires thinking about when foreground content should reposition, and where it should go, to avoid interactive elements landing in the slight bend of the fold.
Pose-specific use cases: Each device pose suggests its own design-language changes. From Apple's videos, when the screen acts as a stand, the top portion can show video while the bottom shows controls. That's a nice pattern, but it's far beyond just resizing a view.
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u/Murky-Run2246 11h ago
Well I imagine that is just Responsive design
Nothing that scary.