> 3. People designing software are getting older and have worse eyes, so larger, clearer, less noisy UIs are a godsend.

"Modern" UIs most often are anything but clear and less noisy. Part of what made the Windows 95 design so strong was that UI elements were separated by visible lines, you exactly knew what the touchbox of any element was, the behavior and look of UI elements, menus and icons were generally consistent across applications...