> Each program was its own island because its interface was unique to the program. However, they were all so similar in how they looked like—80x25 characters didn’t leave much room for uniqueness—and how they worked that the differences didn’t really get in the way of usability and discoverability. Once you learned that the Alt key opened the menus and that Tab moved across input fields and buttons, you could navigate almost any program with ease.

This is the biggest thing I miss in modern GUIs, especially Windows, macOS, or mobile.

Tabbing across every single possible inputs, with alt or control keys for quick access is insanely powerful compared to "click here, scroll this, click click"

I haven't checked in Win 11, but all standard Windows apps used to be fully navigable by keyboard only. Notepad, Wordpad, etc.