Simple alone is a huge feature that's often vastly overlooked.

When you walk into a high-end restaurant, you really don't get a whole lot of choice. Usually, the hallmark of a high-end restaurant is the chef's menu. The chef prepared courses of a dinner in advance where he made all the choices. You eat there because you trust the chef's judgment and want his taste. And this way I think you'll end up with a much tastier meal in the end.

What DHH says:

Nobody would say, "I want to make complex software." But they do say things that amount to the same thing. "I want my software to have tons of features. I want my software to have endless flexibility." Well, all these things are in essence saying, "I want complex software." We're willing to take a stand for simplicity in software. We're willing to say, "You aren't going to get all the features you think you might need some day, you're just going to have the basics executed beautifully.

There's so much software out there that's just endlessly complex, that has too many features, that has too much flexibility, and it ends up not being used because users can't relate to it; they can't get into it. It feels too complex. It feels intimidating when what they really need is just a small subset of what they're given.

Source : From the DHH interview with UX magazine (We use common sense.)
I believe when you specify source, you are not plagiarizing the things !!!

Kind Regards,
CRV