Paper charts are still alive and well in sailing
At this point, I tend to use my iPhone at the helm as well. The charts are updated more often, and the location and tracking are very accurate (with an external Bluetooth GPS).
https://www.federalregister.gov/documents/2017/07/18/2017-15...
https://www.dco.uscg.mil/Portals/9/DCO%20Documents/5p/5ps/NV...
But I sure hope you still keep your sextant and charts dry and safe below deck somewhere if you spend any time at sea.