An argument could be made that longitude doesn’t even matter if your travels span the globe since longitude is arbitrary.
On the other hand if your travels have only spanned half the globe, then the furthest east or west is easily determinable, from a certain point of view, even if you have technically crossed 180 or 0 degrees.
All three ways off looking at longitude make sense, and thankfully, it is not an existential issue if there is a miscommunication, so there is room for a healthy disagreement on the topic.