I've been running the beta for quite some time and didn't even notice that it had changed. Honestly, I think it's the best possible way that they can roll this out - iOS is much more restricted and has fewer devices to worry about, so is worlds easier than macOS, and internal dogfooding/the beta program gives them good coverage before hitting the whole population. Doing it in a dot release or major version doesn't seem particularly interesting one way or the other.