@Hans-Kremers, GPX is the most universal method of transferring routes from one to another program, and if it were me, for that purpose I would use route AND tracks, since only those reassure you of being able to rebuilt a route unchanged.
Explicitly for transferring routes, to other platforms, any closed source MRA specific file export would be senseless, because others can't import it. The only reassurance you get with that, is that you can reupload your routes completely intact to MRA, in case they lose your data. Also, with it you would be able to take old routes out of the platform to keep it plain and uncomplicated, while keeping the option to reupload them. And in itself that is a worthwhile idea.