Factorio's dev blog is a great deal of fun. It's on pause at the moment after the release of 2.0, but if you go through the archives there's great stuff in there. A lot of it is about optimizations which only matter once you're building 10,000+ SPM gigafactories, which casual players will never even come close to, but since crazy excess is practically what defines hardcore Factorio players it's cool to see the devs putting in the work to make the experience shine for their most devoted fans.
Each planet has its own gimmick which throws a spanner into standard builds in its own unique way - one planet is essentially a farm where your factory is growing and processing fruits, which will rot and spoil if they aren't processed immediately -- so you need to design a factory which processes small packets at high speed without any buffering.
