You start on a Friday, forego sleep and responsibilities, and let your weekend couple-of-days spill into a Monday with a brief distracted work day and the early hours of Tuesday.
> Beating Factorio quickly is not the primary point.
Maybe, but once you get into speed running it, it certainly feels like doing things slowly is against the point. (That and everything before robots feels so glacially slow... hard to adjust with Seablock and robots and good logistics chests being so far down the tech tree...)
The primary point of Factorio is what you want it to be, right? There are explicitly speedrunning achievements so surely that type of thing is the point for some folks. And to a certain mindset (time) efficiency is one thing that is fun to optimize.
I've watched a bunch of Factorio vidoes (like KathrineOfSky, and her multi player guest games), and it strikes me how vastly different people's styles are. There was one where she was playing with a German guy who LOVED filling in nice neat square coast lines, and she liked to leave them all "natural".
Also, please tell me how to pack 80 hours of anything into a couple days. :-)