I was amused by this headline in Science (and similar articles elsewhere):
"Many researchers are excited about the nascent project, but others worry it could divert resources from existing collaborations."
We have about 6 climate models at this institute alone (MIROC 4, 4.5, 5, NICAM, CFES, there are a couple of "next generation" models developed on fancy grids), and no-one worries about that spreading resources too thin! That's mostly because no-one cares much about the outcome, of course. (BTW, the MIROC models are not just version changes, but full-blown divergences with separate developer teams and separate code bases).