[eestrada]

It seems like they fell more inline with Semantic Versioning when that format came in vogue. Semantic Versioning is what most devs expect now; it makes sense to communicate the version in a format that has a broadly understood meaning for devs.

[riku_iki]

I think there is no semantic versioning anymore, they just release one major number version every year, regardless how large and backward compatible changes are there.