Allow nesting spreadsheets in Excel
When you create a workbook that would end up having numerous sheets, this fix would allow users to "nest" sheets into each other. For example, a workbook with 20 restaurants and their breakfast, lunch, and dinners would need 60 sheets. The nesting feature would have 20 sheets with just the restaurant names at the bottom and nested sheets for each would include Breakfast Menu, Lunch Menu, Dinner Menu. This would be both user friendly and cleaner.
Ken F. commented
I would use this feature for work a lot. I've created a reasonable facsimile of this but it requires VBA macros. Not every employee has the macros trust settings set for this.This would be a great addition.