Something about your comment rubs me the wrong way, and I think it’s a kind of toxic idealism that doesn’t acknowledge how software isn’t a mathematical object but situated in the real world.

You realize 48 years ago is the Unix epoch? Circumventing this problem to admit commits that were made before 1970, which clearly has no real world use case, is over engineering at its worst. Similarly, with designing a system to last longer than 68 years. The number of tech companies that have lasted more than 68 years can be counted on one hand.