We can turn the regolith into Lunarcrete too. It's moon concrete. Mars with nice sidewalks.

https://techport.nasa.gov/projects/118526

Yup. That gets us to the stone age on the moon. I'm a big fan of bootstrapping the moon's industrial capacity straight to the industrial age. We need not only concrete production but also steel, water, etc. The faster we bootstrap all this stuff the faster the moon will feel like any other place you can go. I think there's gonna be hardware stores on the moon within the century.