What YC has to do - is classical very very early Symptom Ecosystem dissolution.i.e. SV (i know its too early to say so). Its very hard to disrupt such woven ecosystem due to inherent resiliency and there is higher chances it will survive but this is unprecedented . I checked few VC twitter feeds, they are leaning towards Canada ,very early ,very slow but still unprecedented.Networks are strong as long as the inflection point. One can watch this video i attached here to understand how ecosystem fails without the participation from value serving members and how quickly it may :by the way this is all facts checked. Here is vedio how ecosystems are fragile :
http://bit.ly/2mqDdjf .