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4.0.0 (semver) and 4.0.0.0 (Windows) aren't valid numbers anyways; The confusion can only arise on X.Y version numbers. Just add a .0 at the end of those

But why? You don't know how many decimals you'll need in advance - three digits isn't enough for Windows build number, for example.

Some years ago I thought so too. Now I'm just used to it.

Dates are the same, though — 01.15.2018 is not a real number, it's a sequence of integers. (And in many places they're not even written in most-to-least or least-to-most significant order! …I guess that makes it a tuple, not a sequence.)