SteamSpy is actually underestimating a bit.
Honestly sometimes it frightens me the amount of human time that has been put into this game... the input/output ratio is insane. Every little design and art choice I made is so scrutinized by such a massive amount of human attention. Even if it's just people playing a video game, the volume of it is kind of awe-inspiring.
I calculated the total playtime. It's about 32,000 person-years spent playing 12 hours a day every day. Since a human life is around 70 years plus some childhood, that's around 450 entire human lifetimes spent playing RimWorld.
If I was just a bit lazier on a few days I could've improved some little quirk that might have improved that experience by maybe 1%. This would yield something like 4.5 human lifetimes of joy, spread out over all those people. Did I prevent the equivalent of entire lifetimes of happiness by making dumb mistakes or taking vacations? I don't really think so... but I think there's something to think about here.