@Frappawotsit hmmm I try to understand, but honestly, I don't see a risk. If you had downloaded a map for a country and you don't use it any longer - there will be no problem. It only occupies place for data.
If you did not update the map - there will be no issue as long as you don't navigate with this outdated map. Just if want to navigate with an outdated map, an error will popup, the system can't calculate the route. The reason is the outdated map.
Usually, I drive always in the same country. It's not a pitty to keep it up to date. For a holiday journey I prepare everything (also maps) in front of. Afterwards I delete this map because I don't need it any longer.
To update a map needs the same time, as download it newly.