This is relevant in RapidStart, but it would be relevant through Dynamics 365 for Financials. One of the shortcomings to using Cloud-based software, is the slowness when scrolling through a list page. If you showed line numbers (say, on the left side of the page), we would at least have our bearings in terms of knowing how many records we've scrolled through. This is especially important when scrolling through a list that is "fectching more data", but only scrolls up a few records at a time (instead of a whole page at a time).