Good technology is simple. I try to install and run the program without using a manual. Running the program is a different matter. To use an elevator, I press the floor number. To make a phone call, I dial the number.
Simplicity goes hand in hand with range of function.
The problem with MS-Word and a host of other programs is that they try to be all things to all people. Compare that with GuruNet, which lets me look up any word on my computer screen by alt-clicking over the word. Good technology does not require parts. You don't need to replace anything in your telephone. It's easy to overlook parts because they don't seem like parts.