If it helps, keep in mind that the game is not in a releasable state yet and they are also beta testing the game. Nilaus managed to run into a complete gamebreaking bug that he needed to spend some time debugging with Wube and lost a few hours of progress to restore to a valid state.
What is cool about this expansion? I haven’t looked at it because I don’t care all that much. Growing my py factory is taking pretty much all my free time.
4 new planets with new logistics chains, special challenges and enemies, as well as space platforms/rockets. And a bunch of new content to go with it. Its at least double, if not close to triple the amount of content.
Dosh Doshington just made his last Factorio video without the expansuon, after playing with the expansion, and basically complained about how much better the game is with the update about once every couple minutes for an hour while building his first ever megabase, haphazardly.