This user does seem to be correct despite the (at least current) reception of their report, e.g. see https://en.wikipedia.org/w/index.php?title=Member_states_of_...

I agree it probably makes sense for the map to use UN recognized names of the time for times the UN was around and had recognized names for. Whether or not it's the absolute best answer in a given situation... it at least provides a definitive source to defer to for the modern period where the most debates might come from. For more historic names other methods need to be used and blended to the modern names which is sure to be a treat of user debate :).

That was not a "name" but a description.