

Does nobody use info?
So much more in depth than any manpage.
Granted it doesn’t contain every app installed, but it gives very detailed and very verbose explanations, examplea, options, use cases, caveats, warnings, etc, for all of the most essential commands and functions
$ info
In the program these are basic commands :
-I # sets searching to always case insensitive -very necessary (upper case I)
/ # search for pattern
n # search forward
N # search back
You can also search from command line using
Info -k [pattern]



Pipes etc.
A GUI can’t combine commands from several different programs and move data to and from and use that with the ease and explicit nature of a terminal.