Seems like a simple addition. However, maybe there is a conflict with those who sell printed charts.
Many moons ago, when I was a new pilot and charts were much cheaper, I used to cut up charts for long trip and tape each chart in a strip covering 100 miles on each side of the course line. This eliminated the bulk of the unneeded parts of the chart and was easy to attach to my kneeboard. As I proceeded on the trip I just flipped the chart to the next part of the trip.
Since this was way before GPS I would also put 10-mile hash marks across the course line so I could time the transit time between the marks to get my ground speed. How things have changed.