Joel Califa writes on his personal blog about small interface changes to GitHub that have saves millions of developers immeasurable amounts of wasted time and anxiety.
One small change can add up to a big win. High frequency actions (such as creating new PRs on GitHub) take place millions of times a day. A given user might go through the same flow several times per week, per day, or even per hour. These flows become a part of their lives. If there is even a slight inefficiency or frustration, it compounds with every use. One confusing moment that takes an extra 5 seconds—repeated multiple times a day in perpetuity—adds up to a lot of anxiety and wasted time.
My takeaway? Don't underestimate the impact of seemingly small interface changes!