I worked with designers that felt it was their job to modify websites not because it was needed but because they felt that keeping the interface made the site l

I worked with designers that felt it was their job to modify websites not because it was needed but because they felt that keeping the interface made the site look old and dated. I think if the interface works there is no reason to change it but designers might have a point. As an example, Yahoo's website manager felt that the site's interface should change as little as possible so for many many years yahoo's site looked exactly the same. What ended up happening was that people began to think of yahoo's website as being old and not as useful as other sites. The interface was not the cause for yahoo's decline but it did not help that it stayed the same for so many years. Much of techs changes are changes for the sake of change not because they are needed but because without change, we wouldn't know what's helpful vs what's not. So, is it a mistake to design a website's UI without new features? I have to say yes even if I don't like it.