I don't think it came across the way I intended, because I am one of those users who don't really care for most large UI changes. It feels like UI designers are

I don't think it came across the way I intended, because I am one of those users who don't really care for most large UI changes. It feels like UI designers are the only people in large organisations who are actually allowed to throw old code away. My point was more that non-UI improvements are extremely rare, probably because they are both difficult to get right and not "sexy" in the sense of being nicely demo-able to less technically savvy managers.