In fact, if you are not on Windows your OS already _IS_ an IDE. An OS is software, so it also needs to be developed. Therefore it was natural for OS developers

In fact, if you are not on Windows your OS already _IS_ an IDE. An OS is software, so it also needs to be developed. Therefore it was natural for OS developers to create their OS in a fashion that enables development. Apple and Microsoft are the only exceptions, and Apple somewhat backtracked on that path to enable developers as well. Some easy things are usually much faster to learn in a traditional IDE, since it has GUI. But that often leaves people less able to continue development _OF_ their development environment. If you want the full power or understand how stuff works underneath you better use an OS that works as IDE, e.g. Linux.