I've seen this in a lot of offline/fast/??? focused documentation systems... and I really don't get it. Version matters a lot to developers. Wouldn't the develo

I've seen this in a lot of offline/fast/??? focused documentation systems... and I really don't get it. Version matters a lot to developers. Wouldn't the developers know this... being developers themselves? But then I see similar things in supposedly mature and even-more sophisticated systems, like mypy's typeshed which only supports a single version of external libraries' type declarations. How? What madness leads to this? Why not support multiple versions, and offer a way to select them per project from standard dependency declarations, so you're always reading the correct version?