I went looking for more, found a handful of YouTube guides, and figured the useful thing to do with that research was put together one guide that actually covers it end to end: what PI is, the two philosophies for running it, what to train and in what order, and how to build both an extraction setup and a full factory chain.
Get ready to dive down another long guide. You should come out the other end with a solid foundation on Planetary Industry — or Planetary Interaction, if you're working off the same ancient New Eden memory as I am.
