Eventually, I'll get around to dusting off the epic 500 hour Covid Lockdown + Krastorio + SpaceX save game that's been sitting on the shelf for the past year, and finishing it.

Given the availability of blueprint imports and YouTube, I don't think 20 hours is unrealistic. There's just too much content out there now on exactly what to do and when -- jump start base, main bus, bots, modules, launch, trains. When I originally got the game, Nilaus hadn't started doing megabase tutorial videos.

It sucks, but over time the Internet spoils games completely. Mods improve the situation because the content can be too niche for mainstream creators to profitably monetize. Kr+SpaceX is basically impossible to cover outside of Discord.