So when looking at my map or a route, I can scroll along and see the cumulative distance into that route. But what I'd love to also see is the cumulative elevation gain/descent to that point as well.
Often when looking at routes, particularly if I'm training for a race, I'd love to know how much climb there's been up to that point. For example I have a very hilly race coming up soon and I'm trying to match the climb profile to a route(s) around where I live and that's proving very difficult. A cumulative elevation gain and descent stats on that route would allow me to plan for a 10 mile route with 2250 ft of elevation but with 1500 ft in the first 4 miles (for example).