Classic Mojang, I guess it's probably in an attempt to make it easy for users to understand when a release was made.

I was going to say it wouldn't make much of a difference for mods given they only really have one major release a year, but I'm pretty sure they also announced that they wanted to do more small releases instead. So we'll see I guess, main fear I have is that we're going to end up with very weird version range constraints.