Well, we do things now that we didn’t used to do, like write tests :) More is expected in the way of features, not in terms of the number of features but how they work. Imagine clicking a tweet from your timeline, then pressing Back, and being taken to the top of your timeline. It wouldn’t be acceptable. But some thought and care has to be put into making that happen. Just one example but basically there are more concerns than there used to be.