Absolutely. My background was that I was Sun for years and on a "workstation" the most common window open for a software developer was an xterm not some IDE. That said, for people who "grew up" knowing nothing but visual studio and delphi, telling them that everything they are trying to do is easily done in the command line doesn't resonate.

Even though I am a huge command-line fan, I am not sure that "everything they are trying to do [in an IDE] is easily done in the command line" is entirely true ;)

While one can do at least as much, if not more, via a variety of command-line tools, the integrated build & debug workflow of a good IDE is invaluable to many. Esp. for those for whom learning a multitude of command-line tools, and syntaxes to drive gdb, profilers, etc. as a little costly/cumbersome.

ISTR from my days when I was a primary school kid playing around with my grandmother's Mac running System 7 that there were some (fairly lame) third party tools that attempted to implement a DOS-style CLI.