"Non-SFF" may be a misleading term here. There's only one chain that was *designated* SFF, but I wouldn't hold any breath for the other two not ending up turning in an SFF direction! I think this may be a general thing with chain-writing: taking an SFF turn only takes one person to do it, and you can't really undo it once it's done, so unless you run a chain with an explicit "reality only" rule it tends to happen.