When clicking through to a Pipeline run that has an excessively long "Shell script" step output, it can be a pain to get back up to the top of the viewport just to navigate to another stage. Additionally, if you navigate away from the page, when you come back it's hard to tell what you're looking at without bouncing up to the top of the page and then returning to the bottom.
See the sample-app-normal.png attachment
At the minimum, pinning the topnav element would be helpful, see sample-app-fixed.png
What would even be better than that though, would be showing a smaller version (vertically comperssed) of the pipeline flow with that topnav bar. That way I could easily jump to other stages too