[nine_k]

The manual is there usually: type `man`, or `help`, or run the command with `--help`.

Most GUIs also have "endless" pages of options. Grouping them helps quite a bit.

Having many options is usually considered the trait of the rich and powerful. Studying them for the tools you use often may actually save time, compared to googling around the bush every time.

[pjmlp]

Only on specific operating systems, not on a CLI as user interface concept across all operating systems.

GUIs have discovery by definition, users have visual references where to click and possibly see some side effect taking place.

Apparently the UNIX way that gets thrown around the Internet doesn't agree with such endless options.