The navigation data at the waypoint layer is in convenient format to manipulate for various other uses.
It’s useful to be able to Calculate ETAs, DTG, speed required and so forth independent of the bridge. The waypoints can easily entered into an stand-alone GPS for back-up. The printed out waypoint list posted on the bridge is the “official” route so to speak, that which everything else is checked against.
Also unlike the ECDIS all the routes for the last 20 years are safely stored in my possession in easy to search format. It’s far quicker to start with an old route than create one from scratch.
I did set up my office computer to use WP on windows 10 but it’s not the ideal solution.
This thread will give an idea what a PIA it is to try to use waypoint info from the ECDIS Transas route export/imports?