Why EML?
We now know the moon has water, aluminum, titanium, iron, oxygen and other elements available for our use.
Processed into building materials such as powders or roll stock or shipped as raw material in otherwise useful containers, such as sintered regolith, these materials can be shipped to lunar orbit, Earth orbit, Mars orbit, or any of the Lagrange points for as little as a few dollars per kilogram. This is the economic power of a mass driver.
NASA’s Artemis program is real; we are going back to the moon to stay. We will need economic justification. Low-cost raw materials for projects across the solar system are the best way to earn our keep on the moon. This exact same mass driver technology can be used to move valuable raw materials, at low cost, from distant asteroids to any location of your choosing.