Absolutely. I actually had a section about that but had to cut it since it was getting rambly :) There are even other business concerns that go beyond just usag

Absolutely. I actually had a section about that but had to cut it since it was getting rambly :) There are even other business concerns that go beyond just usage statistics. For example, GitHub might see the Mac app as their future, for bringing git to people who aren't familiar with the command line, in which case it would make more sense to make the Clone in Mac button prominent. The other piece I cut was talking about how not only do advanced users only need certain features, but there are also features that only new users need, like walkthroughs and things. It gets really hard to visualize all of those decisions in a flat mockup. But yup I totally agree, trying to redesign an interface that you don't own is always going to be very hard and error-prone. Although GitHub is probably one the interfaces that most of us would have the most success with based on how heavily we use it.