So....
It sounds as though the "Factory" option is recent, which it isn't, as it's been the rolling release option for a while now. But if I understand this announcement correctly, the main development process will now start using Factory's rolling release mechanism as the format for the development of the milestone versions, which sounds good reduction in effort.
I must say I've taken to OpenSuSE again over the last couple of years. Last week's Linux Weekly News (LWN) included a discussion flowing from someone suggesting OpenSuSE has little following, and the support for it was interesting.