normal, modern dev with automated builds and git creates a build every time you commit (or every push), and you can commit for a missing comma so ... with 10 or more people working on it on a daily basis it can go up very fast
edit: it's not the kernel build counter and MS has cheated with it in the past, but it has stayed sequential across the whole NT tree (as this is where any post-2K Windows originates). https://www.howtogeek.com/140411/learn-the-secrets-of-the-wi...