The first person through the door learns where the hinges are.

Going first means encountering the mechanism, the parts that are not documented and only reveal themselves in use. That knowledge is a genuine advantage, and it is only available to whoever accepts the cost of being early. Everyone behind you gets a smoother path and less understanding.

When something is unmapped, consider going first for what you will learn rather than for the position. The understanding tends to be worth more than the head start.