Comment by alpaca128

Why would you not want access to a program's documentation within its own environment? Requiring a working internet connection and a web browser just to look up plain text docs sounds a bit like needing a fax machine to receive a receipt for online payments.

`cmd --help` is usually only a shortened version and rarely includes notes about specific behaviour, for example. Man pages are very comprehensive and can be navigated without needing to switch between windows and different input methods.