We had a workflow where we needed to count business days. The standard solve of generating rows for each day between the dates wouldn't work as it would slow down the workflow too much.
Something that takes 5 seconds in Excel turned into a tremendous pain.
It would be really nice to have a built out tool where you can input the start date / end date (or what field they are tied to).
Which days of the week are considered business days and which days are not.
Which holidays should be excluded and available to add custom holidays.