I read about this and I think that could be a good theme in part to rest a little from the dozer... I understand it like a way to build in separate phases that will be engaged together. In my beginings I hated it because it uses more parts and makes bigger MOCs but now I know well that it is the best way for people like me that do and redo a lot to not to lost a lot of time, then when you have finished the MOC you can eliminate the modularity and some parts if you want but to create MOCs it is essential IMO, well you will not need it if you like all you do but unlucky it is not my case. I have a lot of ideas about it but they will came with the comments I will read for sure. For example with more modular MOCs we could easy add new parts to old MOCs to increase its efficience.