Yes, and it's surprisingly easy to find out where to help! The best colleagues and best teams are where there are a lot of "thank you"s.
The same is true in the article:
"I am indebted in particular to one woman, whose name I will never know". "I also thank the Excel product team for shipping this technology without which this work wouldn’t be as famous."
I wish I knew how to reach out to the author (Sumit Gulwani) or other people in the Excel product team, about a feature that would be really hard to code but really useful to me.
Hierarchical menus of Sheets.
Like bookmarks folders, or Playlist Folders in iTunes, clicking on the Sheet Folder would show every row inside, concatenated into a giant Sheet. Clicking on the Sheet Folder would bring up a menu, which I could then navigate to find a sub-sheet. From a programming perspective I know that it's really hard to do hierarchical nested databases. But from a usability perspective, it would make some of our Excel documents with hundreds of Sheets much easier to navigate.